COPS GRILLED OVER CHANCE THAT FELLOW OFFICER WAS GUNNED DOWN BY FRIENDLY FIRE -- In the tense investigation of the bloody gang shootout, several officers -- including Sully (Skipp Sudduth) and Yokas (Molly Price) -- are grilled about evidence that might suggest that one fellow cop was killed by friendly fire while Carlos (Anthony Ruivivar) is shocked to learn that he might be the reluctant father of a motherless, AIDS-infected baby. Meanwhile, on the one-year anniversary of her ex-partner's death, a seething Kim (Kim Raver) is enraged at ex-hubby Doherty (Eddie Cibrian) for encroaching on her time spent with their young son (guest star Kristopher Scott Fiedel) and her anger spills out onto the streets as she confronts a self-destructive female gang member. Elsewhere, Doc (Michael Beach) is visited by the grateful father of an injured former patient whose debilitating injury might have been caused by the paramedic's error. Jason Wiles, Coby Bell and Amy Carlson also star. TV-14