Plot summary
In the island community of Broad Channel in Queens county, Det. Ryan Fields is murdered following a raid on Russian mobster Valeyev. Nichols and Stevens ( Saffron Burrows ) are called in to investigate but become involved in a turf war with local officer Det. Atwater ( Adam Trese ) and begin to suspect that Fields, and possibly Atwater, are dirty. MCS Capt. Callas requests Atwater's file from IAB Capt. Charles Galloway and finds that Atwater is under investigation. Local youth, Eddie Boyle ( Thomas McDonell ) is suspected of killing Fields, but Atwater shoots him dead before other police arrive.
Nichols and Stevens approach local crime boss Jackie Dooley ( Kevin Conway ) for information as who was formerly involved with Eddie's mother, Moira Boyle ( Marin Hinkle ). Dooley intimates that Atwater was trying to take over Fields' operation and provides enough information to bring about his arrest. First appearance of Mary Elizabeth Mastrantonio as Capt. Zoe Callas.
Credits
Adapted from Wikipedia contributors, Law & Order: Criminal Intent season 9. HTML formatting and reference markers removed.