Johnny Feist
Johnny Feist is a character who appears in the CI Season 5 episode Diamond Dogs. He is a drug addict who commits a series of jewelry store heists with his mother, Dede McCann, a fellow addict. He kills several guards during these heists. When Dede kills his girlfriend Mya Sampson, Johnny turns her in to the Major Case Squad.

He is played by actor Peter Scanavino, who would later land the recurring, then starring, role of Detective Sonny Carisi on SVU in 2014.

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