Roger Cossack is a legal analyst for ESPN, TruTV, and a Distinguished Visiting Professor at Pepperdine University School of Law. Cossack graduated from UCLA and UCLA School of Law and worked as a prosecutor in Los Angeles County, California. Cossack also argued in front of the United States Supreme Court in United States v. Leon, a landmark Fourth Amendment decision establishing the "good faith" exception to the Fourth Amendment exclusionary rule. A former CNN legal correspondent and anchor, Cossack was co-host of the award-winning legal issues program Burden of Proof with Greta Van Susteren. Over the past decade, he has covered numerous cases, including trials involving O.J. Simpson, Kobe Bryant, Michael Vick, Barry Bonds, Bernie Fine, and Jerry Sandusky.