How Black Bird's Jimmy Keene befriended serial killer Larry DeWayne Hall

Larry DeWayne Hall is played by Taron Egerton in Apple TV+'s true crime series Black Bird .

Jimmy Keene , played Jimmy in the series, befriended Hall in exchange for early release.

Hall was convicted of kidnapping and murdering Jessica Roach , 15 , in 1994 .

Larry DeWayne Hall is serving a life sentence for the kidnapping of Jessica Roach .

Jimmy Keene was sent into the prison while his kidnapping conviction was on appeal.

He was chummy with some of the high profile prisoners, including Mafia boss Vincent " The Oddfather" Gigante , who told Jimmy to stay away from the "baby killers".