Former FBI Informant, John Turscak, Identified as Derek Chauvin’s Attacker- Stabbed Chauvin over 20 Times We Said Dec 1, 2023 You Can’t Make This Up: Derek Chauvin’s Attacker, John Turscak, Is a Former FBI Informant They Said Consensus November 27, 2001 Former FBI Informant Gets 30 Years in Prison