Jim Malloy, the president of a medical supplies company, is murdered at a golf course. The victim was in a business partnership with Irish-American mobster Cally Lonegan. A taxi driver named Sebastian Waziri identifies Cally as the passenger he picked up outside the golf course; but two FBI agents, Innes and Washington, claim to have been tailing Cally all night. Briscoe and Green discover that Cally may want revenge for the death of his niece Margaret, who was Malloy's one-time girlfriend and died from an overdose after he plied her with drugs.
Waziri is murdered as well, and ballistics evidence points to Cally. He disappears before he can be arrested, but it emerges he is an FBI informant and helped them take down the Gambese crime family. The FBI has covered up for him on numerous crimes and Innes, who's an old friend of Cally, is protecting him from the Gambese Family. Green and Briscoe arrest Cally in Oneida, where he is staying with his identical twin brother Donald. Donald was Margaret's father, so they both have a motive to kill Malloy. This makes it hard to tell which of the two may be guilty. But witnesses can tell the Lonegans apart, saying Cally looks older.
Carmichael is suspicious that Cally wants a plea for both murders, when he usually does whatever he can to get off the charges. She realizes that the mugshot shown to Waziri was an old one where Cally looked more like Donald does now. The evidence indicates Cally did kill Waziri - but Donald could be Malloy's killer. Sure enough, he took off from work on the day of the murder and was staying at a hotel in New York. Innes says that he and Washington really were with Cally on the night of the murder. He didn't know Donald was involved, but did warn Cally there was a witness (Waziri.)
McCoy charges Cally with Waziri's murder, but before he can be arraigned, he is murdered at Rikers - seemingly on the orders of the Gambese Family. Donald remains free until the DAs can get enough evidence to charge him for Malloy's murder.
Tropes present
- Always Identical Twins: Cally Lonegan has an identical twin who was Malloy's real killer.
- Clingy Jealous Girl: Malloy's body is found by a couple arguing because one of them is convinced her girlfriend is flirting with other women.
- Dirty Cop: Subverted. At first it seems that 2 FBI agents are giving a Fake Alibi to Cally Lonegan for the time of Malloy's murder. However, it turns out that they're telling the truth
- Fake Alibi: Subverted. Much of the episode seems to indicate that Cally Lonegan murdered Malloy, despite the fact that FBI agents gave him an alibi. It turns out, however, that it was his identical twin who did it.
- He Knows Too Much: Cabbie Sebastian Waziri says he saw Cally Lonegan where the victim died. He does not live long after telling that to the detectives.
- It's Personal: After bonding with Sebastian Waziri over family in Somalia, Green takes Waziri's murder very seriously and is determined to get justice.
- Karma Houdini: There's not evidence to charge Donald Lonegan with murder, so he goes free (although Lewin is convinced they will make a case against him.)
- Life Saving Misfortune: The security guard on duty at the golf course fell asleep and didn't see anyone come in. He loses his job, but if he'd tried to confront Mr. Lonegan he could have been killed too.
- Outliving One's Offspring:
- The taxi driver's sisters were killed, but his mother is still alive. Then he is murdered, presumably still during her lifetime.
- It turns out that the murder of Malloy was done by Donald Lonegan, whose daughter died from an overdose of drugs sold to her by Malloy. Donald's wife is also still alive.
