Casey Kyung-Se Lee is a trial and appellate litigator in the New York office of Gibson, Dunn & Crutcher.  Mr. Lee is a member of the Firm’s Litigation Department, as well as the Appellate and Constitutional Law, White Collar Defense and Investigations, Intellectual Property, Antitrust and Competition, Media, Entertainment and Technology, and Fashion, Retail and Consumer Products Practice Groups.

A former federal civil prosecutor, Mr. Lee represents multinational companies across a broad range of industries (including technology, pharmaceutical, fashion, entertainment, and finance) in complex commercial disputes, as well as federal and state government investigations.  Mr. Lee has extensive experience litigating clients’ most sensitive and high-stakes matters involving contract, business tort, antitrust, constitutional, and intellectual property law.  Mr. Lee also has particular expertise in civil investigations involving alleged violations of the False Claims Act, Anti-Kickback Statute, and analogous state laws.

Mr. Lee rejoined Gibson Dunn in 2020 after serving as an Assistant United States Attorney in the Civil Division of the U.S. Attorney’s Office for the Southern District of New York, where he investigated allegations of fraud against the United States under the False Claims Act, Anti-Kickback Statute, and other laws.  Mr. Lee also represented federal agencies and officers in a wide variety of affirmative and defensive matters, including cases involving constitutional law, the Administrative Procedure Act, bankruptcy, employment discrimination, the Freedom of Information Act, and trademark law.

Representative matters include:

• Representing investment fund and investment advisor in putative class action brought by investor alleging unlawful squeeze out; obtained dismissal of class claims and centerpiece breach of contract claim.
• Representing major pharmaceutical company in federal civil investigation involving alleged violations of the False Claims Act and Anti-Kickback Statute.
• Represented multinational telecommunications company in contract dispute involving alleged breaches of obligations under a consortium agreement.
• Represented specialty pharmaceutical company in Federal Circuit appeal involving applicability of patent public use bar to alleged third-party public uses; won reversal of district court’s grant of summary judgment to opposing party.
• Gucci America, Inc.: Represented company in trademark suit against counterfeiters; obtained order compelling Bank of China to produce counterfeiters’ bank records, and subsequent order holding Bank of China in contempt and imposing $50,000 per day fine until Bank of China produced the at-issue records.
• Represented industry-leading media and technology company at trial in federal civil antitrust action brought by DOJ.
• Advised major luxury fashion house in federal trademark appeal.
• Och-Ziff Capital Management: Represented company and its directors and officers in securities and derivative litigation.
• Represented multinational European bank in CFTC investigation relating to foreign exchange rates.

*Includes representations prior to Mr. Lee’s association with Gibson Dunn

Mr. Lee earned his Juris Doctor in 2010 from the University of Virginia School of Law, where he was elected to the Order of the Coif.  At Virginia, Mr. Lee was an Articles Editor for the Virginia Law Review, a semifinalist in the 81st William Minor Lile Moot Court Competition, and a member of the Supreme Court Litigation Clinic.  Following his graduation from law school, Mr. Lee served as a law clerk to the Honorable Debra Ann Livingston of the United States Court of Appeals for the Second Circuit, and was a litigation associate at Cravath, Swaine & Moore.  Mr. Lee graduated cum laude from Yale College in 2004 with a Bachelor of Arts degree in Ethics, Politics, and Economics.

Mr. Lee is admitted to practice in the State of New York, as well as before the United States District Court for the Southern District of New York and the United States Court of Appeals for the Second Circuit.  He is a member of the Litigation Committees of the Asian American Bar Association of New York (AABANY), and the Korean American Lawyers Association of Greater New York (KALAGNY).