Jo sta indagando sul caso di un uomo d'affari di successo, che e' rimasto in contatto con il suo vecchio quartiere di Brooklyn, fino a prendere parte a un progetto di costruzione. Jo tenta di fare luce sul caso interrogando i vecchi vicini della vittima, per scoprire se qualcuno aveva qualche movente per toglierlo di mezzo. DA FARE The episode begins with few guys betting on a game of dice. Just then things go bad between them. A couple is waking down the pavement, and the guy tries to stop the fight. But the girl stops him. They go inside the building. The guys outside are still fighting and they hear a gun shot. A man wearing a hood runs out of the building; the husband is shot. One of the guys from the outside goes inside to help and he calls 911. But the husband cannot hold any longer; he dies. The team arrives at the scene. The guy who died is Kelvin Moore. He was visiting his sister-in-law, Alicia with his wife Elaine. Don tells Mac that the guys in the neighborhood could not give much info about the killer. Mac and Jo find that Kelvin’s and Elaine’s wallets are missing. Don tells them that everyone around would call Kelvin a saint. Mac says: “unless we find the sinner”. Monroe seems a little occupied with some personal issues and Hawkes asks her to leave the scene and talk to Elaine. Hawkes continues to collect the evidence. Danny finds Kelvin’s wallet. Elaine tells Monroe that she remembers the gun, and she also narrates the incident. The killer was wearing a hood and a ski mask. Elaine tells her that her husband was afraid of dying in that block. Don and Jo talk to Alicia. Just then Clyde arrives; he is one of the neighbors and like an elder brother to Alicia. She tells them that nobody knew about their visit to her place. In the lab, Sid is examining Kelvin’s body. Mac arrives for answers. But Sid is confused about one detail; according to Elaine the killer shot Kelvin with the gun pushed into his chest. But the signs around the entry wound show no sign of close contact.