Daniel B. Tehrani

Prior to joining Morgan Lewis, Dan served for more than nine years as an Assistant US Attorney in the US Attorney’s Office for the Southern District of New York (SDNY), where he was deputy chief of the Appeals Unit. During his time at the US Attorney’s Office, Dan was also a member of both the Securities & Commodities Fraud Task Force and Complex Frauds & Cybercrime Unit, where he investigated and prosecuted a wide range of securities and other sophisticated white collar offenses, including accounting fraud, insider trading, fraud involving complex financial instruments, healthcare fraud, structuring, money laundering, embezzlement, and cybercrime. He was lead prosecutor in several jury trials and argued numerous appeals before the US Court of Appeals for the Second Circuit. 

As deputy chief of Appeals, Dan briefed and supervised oral arguments in more than 70 appellate cases, including matters relating to public corruption, securities fraud, violations of the International Emergency Economic Powers Act, and asset forfeiture. Dan also served as the SDNY’s healthcare fraud coordinator. As a federal prosecutor, he worked closely with numerous federal and state law enforcement and regulatory agencies, including the US Securities and Exchange Commission, Federal Trade Commission, US Department of Labor, Consumer Financial Protection Bureau, and the Special Inspector General of the Troubled Asset Relief Program.

Before joining the US Attorney’s Office in 2010, Dan was an associate at a national law firm, and previously worked in mergers and acquisitions at an international investment bank.

• A multinational corporation in an internal investigation related to allegations of tax fraud, merger-related misrepresentations, and corruption
• A state veterans’ home in an independent investigation related to its COVID-19 response
• An investment adviser in DOJ and SEC insider trading investigations
• An international corporation in connection with potential AML issues arising out of a corporate transaction
• A Fortune 500 company in connection with the development of an AML compliance policy
• A pharmaceutical manufacturer in litigation concerning alleged FCA violations
• An SBA lender in connection with law enforcement investigations

Representative investigations and litigation while at the DOJ

• Investigated and prosecuted the chief financial officer of a publicly traded REIT for accounting fraud, resulting in a conviction after trial of multiple counts of securities fraud and filing false statements and certifications with the SEC.
• Investigated and charged three Chinese nationals involved in a scheme to hack into the email servers of multiple law firms, obtain insider information about unannounced M&A transactions, and then trade on that information. One defendant was arrested in Hong Kong but was released to China during the extradition proceeding.
• Investigated and prosecuted the chief financial officer of a publicly traded regenerative medicine company for making false statements to the company's auditors.
• Investigated, prosecuted, and convicted two doctors, two consultants, and 27 former Long Island Railroad employees in connection with a decade-long, billion-dollar scheme to submit fraudulent disability claims to the Railroad Retirement Board. One of the doctors and the two consultants were convicted after a month-long trial. Negotiated and created an amnesty program that resulted in 40 additional claimants admitting guilt and foregoing future disability payments.
• Tried and convicted a pharmacy owner for, among other things, violations of the Bank Secrecy Act.