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Paul Krieger, a co-founder of KKL, is an accomplished trial lawyer who represents companies, executives, directors, and individuals in high stakes investigations, trials, and criminal, regulatory, and civil proceedings. During more than two decades in private practice and senior leadership at the U.S. Attorney’s Office for the Southern District of New York, Paul has an exceptional record of success inside and outside the courtroom.
Paul focuses on white collar criminal and regulatory defense, including securities, financial, accounting, and health care fraud, bribery, money laundering, and cryptocurrency and cybersecurity matters, as well as complex civil litigation and internal investigations. Paul’s work is informed by his extensive trial experience, having conducted a dozen trials in federal court and argued various appeals before the Second Circuit Court of Appeals.
Paul co-founded the firm after serving nine years as an Assistant U.S. Attorney in the Southern District of New York, where he supervised both the Complex Frauds and Cybercrime Unit and the Narcotics Unit and oversaw sophisticated financial fraud prosecutions, cybercrimes, and cryptocurrency cases. His experience includes high-profile trials in public corruption, insurance fraud, health care fraud, and money laundering and significant multijurisdictional matters.
Paul has handled cases involving domestic and international enforcement agencies, including the SEC, FINRA, CFTC, FTC, FINMA, SFO, and FCA. He has experience advising companies and individuals in internal investigations on matters involving founder disputes, whistleblower complaints, cryptocurrencies and other emerging technologies. Paul is the co-author of the chapter, “Representing Clients in Cybercrime and Cryptocurrency Investigations,” in the treatise for practitioners, Defending Corporations and Individuals in Government Investigations.
Show More“Paul is an outstanding and detail-oriented trial lawyer who will learn every detail of a case, is great with juries and witnesses, and is an effective and intimidating cross-examiner.”
Chambers USA
“Paul has very good judgment, a great demeanor and particular expertise in financial fraud.”
Chambers USA
“Paul brings deep knowledge, the ability to guide clients practically through issues and strong credibility.”
Chambers USA
Representative Matters
Government Enforcement / Investigations
- Represented a medical biller charged by the DOJ with a $600 million fraud at a jury trial. The client was acquitted of money laundering, and his sentence was reversed on appeal.
- Represented a high-profile physician in an indictment brought by the DOJ, which was ultimately dismissed.
- Represented the CEO of a defense contractor in connection with an internal investigation related to potential False Claims Act violations. No charges were brought.
- Represented the president of a regional bank in an investigation by the DOJ and FDIC into allegations of BSA/AML violations.
- Represented a pharmaceutical company in investigations by the DOJ and state Attorneys General into off-label sales and marketing practices.
- Represented a hedge fund in an investigation by the SEC and DOJ into allegations of securities fraud and insider trading.
- Represented a Special Committee of the Board of Directors of a publicly traded analytics company in an internal investigation.
- Represented the Board of Directors of two national, non-profit organizations in internal investigations.
- Represented a European internet and technology company in an investigation by the DOJ and in an internal investigation.
Complex Commercial Litigation
- Represented the president of a university in a federal civil litigation arising out of an internal investigation. The matter was successfully settled.
- Represented the co-founder of prominent crypto and digital assets trading firm in alleged market manipulation and fraud litigations.
- Represented various financial professionals and executives in civil and associated litigation who have been the victims of cyber-intrusions, fraud, and extortion attempts.
- Represented an individual in a high-profile civil litigation in the Court of Appeals for the Second Circuit.
- Represented a company in a forfeiture investigation and civil proceeding brought by the Money Laundering and Asset Forfeiture Section of the DOJ.
- Represented an international internet retail company in cross-border litigation relating to an advertising campaign.
- Represented an individual in civil and bankruptcy litigation concerning allegations of fraud and involving life insurance providers, brokers, and agents.
Crypto / Cyber Representations
- Represented the chief compliance officer of a financial services firm focused on digital currency trading and lending in an investigation by the DOJ and SEC. No charges were brought against our client.
- Represented the compliance officer of digital asset mining and trading platforms in an investigation by the DOJ and SEC. No charges were brought against our client.
- Represented a programmer and developer in connection with the launch of a cryptocurrency and crytpo exchange in an investigation by the DOJ. No charges were brought against our client.
- Acted as the independent compliance monitor in a FinCEN and CFTC monitorship of a cryptocurrency exchange.
- Represented the co-founder and principal of a crypto trading and development firm in investigations by the DOJ, SEC, and CFTC and related civil litigation.
- Represented an individual in connection with an investigation by the DOJ concerning the Ethereum blockchain. No charges were brought against our client.
Publications and Speaking Engagements
- Co-author of the chapter, “Representing Clients in Cybercrime and Cryptocurrency Investigations,” in the 2025 treatise for practitioners, “Defending Corporations and Individuals in Government Investigations.” (2025)
- “Representing Individuals Facing Investigations” (Cambridge Forum on Risk Regulation & Enforcement in FinTech, May 14, 2024)
- “Facial Recognition, Decryption, and Your Personal Data: A Look Into Law Enforcement Technologies and Their Impact on Privacy Rights” (Federal Bar Council Fall Retreat, November 2, 2019)
- “The Impact of Aggressive National and Multinational Enforcement of Anti-Corruption Laws in Brazil” (Conference hosted by Pinheiro Guimarães and KKL in São Paulo, Brazil, December 6, 2018)
- “Shell Companies and BSA Issues Related to Cybersecurity / SAR Reporting” (Advanced BSA/AML Specialist Conference hosted by the Federal Financial Institution Examinations Council, July 17, 2018)
- “Securing Consumer Data in Today’s Cyber Threat Landscape” (Comply 2018 – The RegTech and Compliance Conference, May 17, 2018)
Related Capabilities
Credentials
Education
J.D., Harvard Law School
cum laude
B.A., Cornell University
Phi Beta Kappa
Hon. Denise L. Cote, U.S. District Court, SDNY
Government Service
Assistant U.S. Attorney, U.S. Attorney’s Office, SDNY
Chief, Complex Frauds and Cybercrime Unit
Chief, Narcotics Unit
Admissions
New York
U.S. District Court, SDNY
U.S. District Court, EDNY
U.S. District Court, WDMI
U.S. Court of Appeals, Second Circuit
U.S. Court of Appeals, Seventh Circuit
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