Nick Monaco appeared in Like a Redheaded Stepchild. He was a thief turned murderer who killed Walton Parcell.
Prior to the episode, there was a jewelry store robbery that took place. Nick had been sneaking out of prison and had orchestrated the heist. On his second rendezvous outside of prison, Walton saw him and pursued. Nick brandished a prison shank and stabbed him repeatedly, killing him.