This video from the new show 'Unsolved' teases the real-life FBI informant who ignited a major corruption theory in Biggie's murder case

• USA's new crime drama "Unsolved" is based on the real murders of Tupac Shakur and The Notorious B.I.G. (Christopher Wallace) in the 1990s.
• The series stars Jimmi Simpson as Detective Russell Poole.
• In a new exclusive sneak peek shared with INSIDER, a new key witness is teased. 
• "Psycho" Mike was a real paid FBI informant who caused a stir in the murder cases.
• He accused mogul Marion "Suge" Knight and an LAPD officer of orchestrating Biggie's death.
• "Pyscho Mike" later admitted his info was "all hearsay,"the LA Times reported in 2005.
• In the video, Russell Poole hears about "Pyscho" Mike for the first time.
• The newest episode of "Unsolved" airs on Tuesday, March 13.
• Watch the exclusive video sneak peek for Tuesday's episode below.

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