Quit Sniping At Each Other
While perp-walking brothel madam Mrs. Chang (Jennifer Lim) through a scrum of reporters, Amanda (Kelli Giddish) gets (non-fatally) shot by a sniper; naturally, the assumption is that it's part of the madam's organization. But the focus of the investigation shifts when Lt. Howard (Cathy Moriarty), who supervised Fin (Ice T) in the late '90s when he was in Narcotics in Brooklyn, appears at the hospital: her son has also been shot by a sniper, and killed. Fin reaches out to his old partner, Luis Montero (Yul Vazquez), for help looking at notorious criminals they may have busted together.
As more victims fall -- including Ana (La La Anthony), girlfriend to Benito Escobar (Emilio Rivera) -- the cops link the murders to an obscure brand of gun that was last used in a gang shooting when Luis and Fin were working together. Finally, Fin gets the nerve to ask Luis about it, and Luis confesses to all the shootings.
Psych! Luis was covering for his daughter Gloria (Jessica Camacho), an Army veteran who was kicked out of the police academy, on psychological grounds, two months earlier.
The case of Christopher Dorner, an LAPD officer who committed several random shootings over a matter of days a few months ago and issued a complex manifesto while a fugitive from justice, was a clear inspiration.
No one tried to cover for Dorner; Dorner did not survive his attempts to escape arrest.
Fin and Amaro (Danny Pino) are in the middle of beating up Escobar in jail when the warden enters to announce that Ana's been killed, so Escobar's probably not responsible for the ongoing crime spree.
Fin, who blames himself for not keeping in touch with the Monteros and thus unconsciously stoking Gloria's homicidal rage against the many people and entities that ruined her family.
Rollins is still getting threatening texts not just from bookies to whom she owes money, but also from friends of her sister's dirtbag boyfriend, whom Rollins killed a few months back.