A&E is cashing in on the true crime phenomenon with two new unscripted, investigative series, the first starring famed prosecutor Marcia Clark, and the second featuring the great debaters Nancy Grace and Dan Abrams.

Marcia Clark Investigate the First 48 will delve into some of America's most shocking crimes that have remained unsolved or ended with controversial outcomes. Each two-hour episode will dig into a specific case, tracking the first 48 hours of the investigation that can be a make or break window that determines whether a case gets solved or not.

"This series feels like a continuation of a mission I've been on my whole life," said Clark. "To discover the truth, bring that truth to light and seek justice has always been a driving force for me. I couldn't be more excited or more honored to be a part of it."

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The famous mysteries Clark will be investigating include the Casey Anthony case, the murder of actor Robert Blake's wife Bonny Lee Bakley, the disappearance of Drew Peterson's wife Stacy and many more. The series premieres Thursday, March 29 at 8/7c .

As for Grace vs. Abrams, if you're a fan of their Good Morning America segments, this is the show for you. Grace and Abrams will take compelling and opposing points on crimes and trials that captured national attention. Grace vs. Abrams premieres March 29 at 10/9c.

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