Leonid (“Lenny”) Feller, a former federal prosecutor, practices white collar criminal defense and government investigations, defending corporations and individuals in federal and state criminal, civil, and regulatory proceedings. His practice includes defending claims of health care fraud, securities fraud, antitrust violations, public corruption, and environmental crimes. He is also an accomplished civil litigator, with broad trial and appellate experience in all aspects of complex commercial litigation, including multidistrict litigation, False Claims Act suits, consumer class actions, mass tort and product liability litigation, and contract disputes in federal and state courts throughout the United States. Lenny is also a lecturer at the University of Michigan Law School, where he has taught courses on federal criminal prosecution, investigation, and defense. He is the co-author of Criminal Pretrial Advocacy 3rd Ed. (West 2019) and numerous other scholarly works.