Criminal Defense

Our White Collar Criminal Defense group is frequently retained by corporate and individual clients who have been identified as witnesses in, or subjects or targets of, ongoing investigations. We have had great success in minimizing our clients’ exposure, frequently helping them avoid regulatory sanctions and criminal prosecution. We are also experienced trial lawyers and have an excellent track record in criminal trials and appeals.

Our Paris team has extensive trial experience before a wide variety of French courts, and notably the French financial prosecutor (PNF – Parquet national financier) regarding white collar criminal cases.

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Best Lawyers in America recognizes 12 Cohen & Gresser attorneys in its newly-published guide. The prestigious publication—now in its 31st edition—evaluates and selects lawyers through an extensive peer-review process, ensuring that the recognition reflects the consensus of top legal professionals regarding the expertise and abilities of their colleagues within the same geographic and practice areas.

Five C&G attorneys are recognized by their peers as “Best Lawyers” in their respective practice areas:

Seven C&G attorneys are recognized as “Best Lawyers: Ones to Watch” in their respective practice areas:

Four Paris-based partners have been recognized in the 2024 edition of Best Lawyers in France. Angéline Duffour is recognized for labor and employment law. Muriel Goldberg-Darmon is recognized for banking and finance law, financial institutions, mergers and acquisitions law, and regulatory practice. Loïc Henriot is recognized for criminal defense and litigation. Johannes Jonas is recognized for corporate law. Best Lawyers relies entirely on peer review to determine and recognize professional excellence.
International law firm Cohen & Gresser is pleased to announce that ten of its New York-based lawyers have been recognized by their peers in the 2023 edition of the Best Lawyers in America. Selection in the 29th edition of the guide “is based entirely on peer review.” The survey process is “designed to capture, as accurately as possible, the consensus opinion of leading lawyers about the professional abilities of their colleagues within the same geographical area and legal practice area.”

Six C&G attorneys have been recognized by their peers as a “Best Lawyer” in their practice areas:

Four C&G attorneys have been recognized as “Best Lawyers: Ones to Watch” in their practice areas:
Three Mayfair-based lawyers from Cohen & Gresser—Jeffrey M Bronheim, John W Gibson, and Richard Kovalevsky KC—have once again been recognized among the top corporate and criminal lawyers for high-net-worth (HNW) individuals by Spear’s Wealth Management in their 2022 Legal Index. The Spear’s Legal Index identifies the top legal counsel for private clients in the UK.

Jeff Bronheim is featured as a “Top Recommended” corporate lawyer, with Spear’s highlighting that Bronheim is “highly recommended” in wealth management and is an “eminent and personable partner.” The guide notes that “any Mayfair financier who is thinking of branching out into new business ventures” should “give [Bronheim] a call.” Bronheim serves as the Managing Partner of Cohen & Gresser’s London office and has over 30 years of experience assisting funds, companies, HNW individuals, and family offices with complex legal and business issues.

John Gibson, head of Cohen & Gresser’s UK White Collar and Investigations Practice, is featured as a “Top Recommended” criminal lawyer in the 2022 index. He is commended by Spear’s for his “particular expertise with UK/US cooperation in economic crime investigation” and experience working with the U.S. Department of Justice and Federal Bureau of Investigation. With almost three decades of litigation and advisory experience, including five years as a senior prosecutor in the bribery and corruption unit of the UK’s Serious Fraud Office (SFO), Gibson’s practice at Cohen & Gresser focuses on complex economic crime, investigations, and regulatory matters in the UK, Europe and emerging markets.

Richard Kovalevsky KC has maintained his long-standing status as a “Top Recommended” criminal lawyer in the Spear’s index. Kovalevsky is the head of the Criminal Defense Practice for Cohen Gresser’s London office, specializing in advising and representing HNW individuals in connection with international and domestic legal matters. Spear’s states, “What’s noteworthy is the wide range of cases that come across Kovalevsky’s desk – from cases involving business, finance, stock market dealings, listings and announcements, to corruption, tax, fraud and money laundering.” The index similarly praises Kovalevsky for his wide-ranging client base, which includes global business leaders and high-profile politicians to HNW individuals and members of prominent families.

From Cohen & Gresser’s London office, Bronheim, Gibson, and Kovalevsky and their UK colleagues work closely with attorneys in Cohen & Gresser’s U.S. and Paris offices on complex multi-jurisdictional matters and offer a multi-disciplinary practice tailored to the needs of ultra-high and high-net-worth individuals and family offices. Leveraging decades of experience, including at premier investment houses, the Bar, and the top tier of elite global law firms, Cohen & Gresser delivers consistent, high-quality service across the types of matters our clients are likely to face, including fund investing and structure, strategic transactions, art law and restitution, privacy and data security, employment matters, tax issues, regulatory considerations, commercial disputes, reputation management, and, when necessary, defense against litigation, investigation, and prosecution.

Paris Partners Johannes Jonas, Muriel Goldberg-Darmon, and Loïc Henriot were recognized in the 2023 edition of The Best Lawyers in France. Johannes was recognized for Corporate Law; Muriel for Banking and Finance Law, Financial Institutions, Mergers and Acquisition Law, and Regulatory Practice; and Loïc for Criminal Defense and Litigation.

About The Best Lawyers in France

The Best Lawyers in France were recognized by their peers in the legal industry for their professional excellence in their respective practice areas.

International law firm Cohen & Gresser has been recognized in The Legal 500 United States 2022 guide for “bringing excitement and innovation to the practice of law.” The 2022 guide recognizes more C&G lawyers and practice areas than ever before, including a 58% increase in individual attorney recommendations and new rankings at the practice and “Leading Lawyer” levels.

The guide highlights C&G’s “elite group of practitioners” and use of advanced machine learning techniques and notes that the firm “handle[s] cases that are every bit as complex and challenging as big, national law firms.” Commentators noted that the firm “punches way above its weight” in litigation and investigation matters.

C&G Co-Founder Mark S Cohen is one of only two lawyers in the United States to be recognized as a “Leading Lawyer” in both Securities Litigation: Defense and Corporate Investigations and White-Collar Criminal Defense. Commentary from The Legal 500 recognizes Mark as a “top-tier advocate” who is “at the top of the profession” and “can litigate with the best of them.”

For the first time, C&G’s Antitrust practice has been recognized in Antitrust: Civil Litigation/Class Actions: Defense for its handling of class action cases concerning allegations of cartel behavior, monopolization, and other exclusionary conducts. The Legal 500 cites the leadership of Melissa H Maxman and the addition of “heavyweight” lawyer John Roberti as key reasons for the practice’s recognition.

C&G is again recognized in the Advice to Individuals and Advice to Corporates categories of the Corporate Investigations and White-Collar Criminal Defense section. The Legal 500 commentary notes that the practice is led by “partners with deep experience who obtain excellent results for clients” and is “well placed to handle transatlantic cases” with offices in New York, Paris, and London, and has “particular expertise in financial crime, antitrust enforcement, public corruption, and tax issues.”

The guide has also recognized C&G once again in the General Commercial Disputes category, praising the practice for showing the “discipline and focus necessary to win a case.” Testimonials from the guide highlight the team’s ability to “handle large and complex matters” with “experienced people, good judgment,” and “better use of technology.”

For the 10th consecutive year, C&G has been recognized in the Securities Litigation: Defense category for the firm’s “expertise in the financial services sector” and “recognized trial expertise” in cross-border and domestic securities litigation and enforcement proceedings. The Legal 500 emphasizes the team’s “strong practitioners” and “attentiveness to clients” in the 2022 guide.

Recognized Practices:

  • Antitrust: Civil Litigation/Class Actions: Defense
  • Corporate Investigations and White-Collar Criminal Defense: Advice to Individuals
  • Corporate Investigations and White-Collar Criminal Defense: Advice to Corporates
  • General Commercial Disputes
  • Securities Litigation: Defense
Recognized Individuals:

Antitrust: Civil Litigation/Class Actions: Defense

  • Melissa H Maxman
  • John Roberti
  • Ronald F Wick
Corporate Investigations and White-Collar Criminal Defense

  • Jonathan S Abernethy
  • Jason Brown
  • Mark S Cohen
  • S Gale Dick
  • Jeffrey I Lang
  • Melissa H Maxman
  • Reggie Schafer
General Commercial Disputes

  • Mark S Cohen
  • S Gale Dick
  • Lawrence T Gresser
  • Melissa H Maxman
  • Daniel H Tabak
Securities Litigation: Defense

  • Jonathan S Abernethy
  • Mark S Cohen
  • S Gale Dick
  • Lawrence T Gresser
About The Legal 500:

The Legal 500 analyzes the capabilities of law firms across the world. Its rankings “highlight the practice area teams who are providing the most cutting edge and innovative advice to corporate counsel.”

International law firm Cohen & Gresser is pleased to announce that London-based partners John W Gibson and Richard Kovalevsky QC have been recognized in the 2023 edition of the Best Lawyers in the United Kingdom. The publication was recently featured in the Financial Times. John and Richard were both recognized as “Best Lawyers” for their work in matters relating to Fraud. Recognition in the guide is based entirely on peer review, “highlighting the most influential and effective players in the legal arena.”

Who’s Who Legal (WWL) has recognized Richard Kovalevsky QC as a Leading Practitioner in the WWL Investigations 2022 guide. The guide highlights leading lawyers across more than 40 jurisdictions for their first-class work in investigations, spanning white-collar crime, corporate compliance and regulatory enforcement.

Leading practitioners are determined by an independent analysis of the opinions of corporate counsel and investigations experts from around the world. Richard joins a distinguished group of lawyers and experts from 46 jurisdictions who are “considered leaders in the field.”

Who’s Who Legal is an organization that identifies the foremost legal practitioners and consulting experts in business law based upon comprehensive, independent research.

 

International law firm Cohen & Gresser today announced that Andrew Mitchell QC, a distinguished barrister and Queen’s Counsel, has joined the firm’s White Collar Defense & Regulation practice as Of Counsel. He will work closely with all of the firm’s international offices to support clients worldwide in civil and criminal matters relating to financial wrongdoing.
U.S. News – Best Lawyers have once again recognized Cohen & Gresser among the Best Law Firms in the United States. As a testament to the firm’s capabilities and experience, the 2022 guide has honored Cohen & Gresser with multiple Tier 1 rankings in the New York region.

Cohen & Gresser has been nationally ranked as a Best Law Firm in two practice areas – Criminal Defense: White Collar and Commercial Litigation.

Additionally, the firm has been recognized in New York as a Best Law Firm in four practice areas – Criminal Defense: White-Collar, Product Liability Litigation – Defendants, Commercial Litigation, and Litigation – Securities.

The U.S. News – Best Lawyers “Best Law Firms” rankings are based on a rigorous evaluation process that collects data from clients, professional references, and attorneys currently recognized as Best Lawyers.

View the complete results of C&G’s rankings.

Cohen & Gresser is pleased to announce that 37 of the firm's New York and Washington D.C.­based attorneys have been named to the 2021 Super Lawyers List across a wide range of practice areas. C&G co-­founder Mark S Cohen and partners Jonathan S Abernethy and Daniel H Tabak have also been named to the Super Lawyers list of the top 100 lawyers in the New York metropolitan area, and partner Karen H Bromberg has been recognized as one of the top 50 women lawyers in the New York metropolitan area.

Super Lawyers ranks outstanding lawyers who have attained a high degree of peer recognition and professional achievement. Only five percent of the lawyers in each state are selected as Super Lawyers, and only 2.5 percent are selected as Rising Stars.

Super Lawyers

Jonathan S Abernethy: Criminal Defense: White Collar

Kwaku Andoh: Mergers & Acquisitions

Elizabeth Bernhardt: Business Litigation

Thomas E Bezanson: Personal Injury – Products: Defense

Colin C Bridge: Criminal Defense: White Collar

Karen H Bromberg: Intellectual Property

Jason Brown: Criminal Defense: White Collar

Joanna K Chan: Securities Litigation

Mark S Cohen: Business Litigation

S Gale Dick: Business Litigation

Christian R Everdell: Criminal Defense: White Collar

Lawrence T Gresser: Business Litigation

Oliver S Haker: Business Litigation

Johannes Jonas: Mergers & Acquisitions

Nicholas J Kaiser: Real Estate

Jeffrey I. Lang: Business Litigation

Melissa H Maxman: Antitrust Litigation

Ellen Paltiel: General Litigation

Nathaniel P T Read: Business Litigation

Bonnie J Roe: Securities & Corporate Finance

Stephen M Sinaiko: Business Litigation

C Evan Stewart: Securities Litigation

Daniel H Tabak: Business Litigation

Scott D Thomson: Business Litigation

Alexandra Wald: Business Litigation

Ronald F Wick: Antitrust Litigation

Rising Stars

Luke Appling: Civil Litigation

Sharon L Barbour: Criminal Defense: White Collar

Drew S Dean: General Litigation

William Kalema: Business Litigation

Sri Kuehnlenz: Civil Litigation

Winnifred A Lewis: Securities Litigation

Marvin J Lowenthal: Criminal Defense: White Collar

Barbara K Luse: Criminal Defense: White Collar

Matthew V Povolny: Business Litigation

Benjamin Zhu: Criminal Defense: White Collar

Global Investigations Review (GIR) has again nominated Cohen & Gresser for its Most Important Court Case of the Year award for the major victory at the UK Supreme Court achieved by C&G’s Richard Kovalevsky QC on behalf of KBR Inc. On February 5, 2021, the UK Supreme Court handed down a landmark judgment that delivered a decisive victory to KBR Inc. and agreed to the arguments presented by Richard and the rest of the KBR legal team. In its decision, the Supreme Court held that the SFO could not compel a foreign company to produce documents held abroad under Section 2(3) of the Criminal Justice Act of 1987.

Cohen & Gresser is pleased to announce that Spear’s Wealth Management has named Jeffrey M BronheimJohn W Gibson, and Richard Kovalevsky QC to its 2021 Legal Directory & Hommes d’Affaires index. The Spear’s legal index identifies the top legal counsel for private clients in the UK.

Jeff Bronheim is featured as a “Top Recommended” corporate lawyer in the 2021 index. Spear’s notes that Jeff is an “eminent and personable partner” and “comes highly recommended by a senior adviser in wealth management.” Jeff serves as the Managing Partner of Cohen & Gresser’s London office and has over 30 years of experience assisting funds, companies, high-net-worth individuals, and family offices with complex legal and business issues, including investments, regulatory considerations, disputes, and structural planning.

John Gibson is featured as a “Top Recommended” criminal lawyer in the 2021 index and is commended for his “expertise with UK/US cooperation in economic crime investigation.” John leads Cohen & Gresser’s UK White Collar and Investigations practice and is a former senior prosecutor at the UK’s Serious Fraud Office. He offers rare insight into the focus of UK law enforcement and financial regulation, when and how to engage with regulators and prosecutors, and how to develop and deploy the best litigation strategy for a wide range of criminal and compliance situations.

Richard Kovalevsky QC, featured consistently by Spear’s as a “Top Recommended” criminal lawyer, is once again included in the 2021 criminal lawyers and hommes d’affaires indices. Spear’s highlights “the wide range of cases that come across Kovalevsky’s desk” and notes that “his client base is similarly varied.” Richard is the head of Criminal Defense for the London office. He specializes in advising and representing high-net-worth individuals in connection with international and domestic issues and is known for his discreet tactical approach and expertise.

From Cohen & Gresser’s office in Mayfair, Jeff, John, Richard, and their UK colleagues work closely with attorneys in Cohen & Gresser’s U.S. and French offices on complex multi-jurisdictional matters and offer a multi-disciplinary practice tailored to the needs of ultra-high and high-net-worth individuals and family offices. Leveraging decades of experience, including at premier investment houses, the Bar, and the top-tier of elite global law firms, Cohen & Gresser delivers consistent, high-quality service across the types of matters our clients are likely to face, including fund investing and structure, strategic transactions, art law and restitution, privacy and data security, employment matters, tax issues, regulatory considerations, commercial disputes, reputation management, and, when necessary, defense against litigation, investigation, and prosecution.

International law firm Cohen & Gresser is pleased to announce that eight of its lawyers have been recognized in the 2022 edition of the Best Lawyers in America. Selection in the 28th edition of the guide is based entirely on peer-review surveys in which tens of thousands of leading lawyers evaluate their professional peers.

Five C&G attorneys have been recognized by their peers as a “Best Lawyer” in their practice areas:

  • Jonathan S. Abernethy – Criminal Defense: White-Collar
  • Thomas E. Bezanson – Commercial Litigation and Product Liability Litigation: Defense
  • Jason A. Brown – Criminal Defense: White-Collar
  • Mark S. Cohen – Criminal Defense: White-Collar
  • Evan Stewart – Litigation – Securities

Three C&G attorneys have been recognized as “Best Lawyers: Ones to Watch” in their practice areas:

  • Sharon L. Barbour – Criminal Defense: White-Collar
  • Winnifred A. Lewis – Commercial Litigation
  • Alexandra K. Theobald – Commercial Litigation

Richard Kovalevsky QC has been recognized by Chambers in its 2021 High Net Worth guide as a Band 1 lawyer for Financial Crime: High Net Worth Individuals in the UK. Chambers notes that Richard is “highly sought after by high net worth individuals under investigation by the FCA, the SFO and the DOJ.”

Richard received outstanding praise from clients and colleagues, with one interviewee describing him as “a very bright lawyer” with a “lovely presentational style” and “savviness.” Another interviewee notes that “he is very down to earth, very straightforward, and clients like that. He comes up with creative solutions to complex problems. He is very dedicated to his clients and he is very good to work with."

 Published by Chambers & Partners, the High Net Worth Guide ranks the leading lawyers and law firms for international private wealth. The guide is used by family offices and professional advisers to wealthy individuals, providing objective guidance on an international scale.

Paris Partners Johannes Jonas, Muriel Goldberg-Darmon, Loïc Henriot, and Guillaume Seligmann were recognized in the 2022 edition of The Best Lawyers in France. Johannes was recognized for Corporate Law; Muriel for Financial Institutions and Regulatory Practice; Loïc for Criminal Defense; and Guillaume for Information Technology Law and Privacy and Data Security Law.  Additionally, Héloïse Masson was recognized in The Best Lawyers in France: Ones to Watch. Héloïse was recognized for Privacy and Data Security Law.

About The Best Lawyers in France
The Best Lawyers in France were recognized by their peers in the legal industry for their professional excellence in their respective practice areas.

In this Law360 profile, John W Gibson discusses his five-year stint as a senior prosecutor and investigations manager in the UK Serious Fraud Office’s bribery and corruption unit, how he uses that experience to understand what matters when engaging with regulators and prosecutors, and how to deploy effective litigation strategy in criminal or compliance matters. (Subscription required.)

John Gibson spoke with Financial News to discuss the Financial Conduct Authority’s recent warning that the agency is keeping a close eye on the use of unauthorised messaging apps in finance.

“The really critical thing for firms to do is to not ignore warning signs… [or] turn a blind eye to situations in which they [firms] know that private devices are being used for business purposes,” said John, adding that doing so represented “unquestionably [a] failing in your regulatory obligations.”

“The way in which people are working remotely and using chat applications, is storing up risk for both institutions, and for their potential supervision and enforcement of the rules,” added John. (Subscription required.)

Richard Kovalevsky QC spoke with Law360 about the UK Serious Fraud Office's probe into one of the world's biggest bribery scandals. "In a normal period of time you would say it was a success for SFO, but there have been difficulties along the way," said Richard Kovalevsky QC of Cohen & Gresser LLP, adding that "the overall success of the case is probably freestanding" from criticism leveled at the SFO. Richard added that he “wouldn't rush to judgment on Osfosky's interaction with the go-between until everything is clear." (Subscription Required)

On 5 February 2021, the Supreme Court of the United Kingdom handed down a landmark judgment, delivering a decisive victory to KBR Inc. and agreeing to the arguments presented by Cohen & Gresser’s Richard Kovalevsky QC and the rest of the KBR legal team. The Supreme Court held that the Serious Fraud Office (SFO) could not compel a foreign company to produce documents held abroad under Section 2(3) of the Criminal Justice Act of 1987. The decision was covered by the following publications:
On 5 February 2021, the Supreme Court of the United Kingdom handed down a landmark judgment, delivering a decisive victory to KBR Inc. and agreeing to the arguments presented by Cohen & Gresser’s Richard Kovalevsky QC and the rest of the KBR legal team. The Supreme Court held that the SFO could not compel a foreign company to produce documents held abroad under Section 2(3) of the Criminal Justice Act of 1987.

John W Gibson speaks to Law360 about the recent memorandum of understanding announced by the Serious Fraud Office (SFO) and the Competition and Markets Authority that shifts responsibility for the enforcement of the most serious and complex cartel offenses to the SFO.

International law firm Cohen & Gresser today announced that Richard Kovalevsky QC, a distinguished barrister and Queen’s Counsel, will join the firm’s White Collar Defense & Regulation group as a partner in its London office. As head of Criminal Defense for the London office, Richard’s hire will bolster Cohen & Gresser’s highly-regarded White Collar Defense practice and strengthen the firm’s ability to provide clients with sophisticated and strategic guidance on the most complex government and internal investigations.

Cohen & Gresser announces the expansion of its London office and White Collar Defense & Regulation group with the appointment of partner John W Gibson. A former UK Serious Fraud Office (SFO) senior prosecutor, John will focus his practice on cross-border corporate investigations and white collar defense. He has over 25 years of experience as a barrister, and advises on all matters relating to law enforcement, regulatory and internal investigation of suspected crimes and regulatory breaches, as well as the defense of companies and individuals. In addition, John has expertise in data strategy and the use of artificial intelligence (AI) in big data litigation and investigations.
U.S. News & World Report and Best Lawyers have recognized Cohen & Gresser as a New York Best Law Firm for white collar criminal defense. The Best Law Firms rankings are based on an in-depth review process, and recognize professional excellence and strong ratings from clients and peers.
U.S. News & World Report and Best Lawyers have recognized Cohen & Gresser as a New York Best Law Firm for white collar criminal defense. These rankings are based on an in-depth review process, and recognize professional excellence and strong ratings from clients and peers.
Corruption allegations at multinational companies can often lead to several jurisdictions launching investigations that can drag on for years and cause significant damage to a company’s reputation and ability to conduct business. With different factors in each jurisdiction for what grants the authority to charge companies and individuals with criminal offenses, multinational companies need to work with advisers and create a strategy for timely global settlements at the outset of any global corruption allegations.

In this article for Financier Worldwide, John W Gibson identifies several strategic considerations for boards to consider when facing corruption allegations, including finding lawyers that can work in close partnership with forensic accountants, industry experts, data scientists, and corporate intelligence experts to piece together what has happened, an early review of the company’s compliance program and implementation of anti-bribery and corruption best practices, strategic evaluation of the jurisdictions in which to report, and why it’s essential at the beginning of an investigation to commence meaningful, straightforward dialogue with the key lawyers and investigators in each investigating jurisdiction.

This article first appeared in the February 2022 issue of Financier Worldwide Magazine.

The cryptocurrency industry should brace itself for increased scrutiny from the DOJ and other enforcement agencies. The DOJ recently announced the creation of a National Cryptocurrency Enforcement Team (“NCET”), which will have the authority to tackle investigations and prosecutions of criminal misuses of cryptocurrency. NCET will not only pursue its own cases but will work closely with other federal agencies, subject matter experts, and law enforcement partners throughout the government to support existing and future cases across the country.

  • The announcement further suggests that NCET’s initial mandate will broaden the enforcement focus from criminal actors themselves to those who enable and facilitate illicit activities involving cryptocurrency.
  • Cryptocurrency exchanges should take appropriate steps to work with counsel to avoid becoming the subject of a DOJ investigation or prosecution.
  • The increased scrutiny will also likely extend to all cryptocurrency-focused businesses, NFT platforms, companies that accept cryptocurrency as payment, and even those that merely do business with third parties dealing in cryptocurrency.
  • Given the heightened scrutiny from the DOJ and a constantly evolving regulatory landscape, all companies in the industry should evaluate compliance programs and practices to mitigate risk and exposure.
In this C&G client alert, Christian R Everdell and Barbara K Luse explore the specifics of the NCET mandate, including its anticipated collaboration with the SEC and other federal agencies, and examine what’s on the horizon for cryptocurrency exchanges and other cryptocurrency-focused businesses. The authors identify some key takeaways for companies dealing with cryptocurrency, including cryptocurrency exchanges, crypto funds and financial institutions, and more.

In his latest column for Federal Bar Council Quarterly, C Evan Stewart revisits the trial of O.J. Simpson.
Richard Kovalevsky QC will speak at GIR Live: London on a panel that examines crisis management from the perspective of in-house and private practice lawyers, media experts, journalists, enforcers and NGOs. Panelists will discuss how things look from their perspective in a crisis and why things play out the way they do.
Ron Wick moderated this second installment of the ABA Section of Antitrust Law's Class Action Series. The program offered insights into best practices in presenting and rebutting economic evidence, including retaining and working with experts; tactical considerations and evidentiary issues unique to class actions; and the impact of the U.S. Supreme Court's most recent class certification decisions on antitrust class actions.