 When Mark and Amanda twist Steve -who receives the first of several letters quoting the penal code on crimes he s about to witness- and Jesse s arms to host a musical benefit at BBQ Bob s, a customer is hit by a stray bullet from the jewelry shop across the street being robbed by well-prepared men. After Steve shoots robber Nestor in the leg the leader kills him and taunts Steve about the lousy LAPD equipment compared to his, he dares Steve to kill him. The next day his next announced crime is robbing Steve s car to dump it in the river. Mark figures out his twitch is caused by the terminal disease Huntingdon s, and how this is his motive.