Finding that neither Guardo Lima nor Antwon Mitchell were behind Lem's death puts Vic back at ground zero in his search for a suspect. But when Shane insists that they drop it, Vic wonders if he may be hiding something. As Tina returns to work at the Barn, the search for Lem's killer takes an unexpected turn when Nydia Hernandez, the girlfriend Vic used to lure Guardo back to the States, shows up, leaving Dutch wondering if Vic knows more than he's letting on. But Vic's cover-up is sidetracked when the Strike Team is ordered to investigate the murder of Emily Martin, the daughter of City Controller Robert Martin. And since the building where she was killed is a drug haven, Aceveda asks Hiatt to keep from damaging the family's name. The murder investigation turns to Emily's boyfriend, a small time drug dealer known as Snail. After warning Aceveda that it will be difficult to protect the late girl's reputation, Hiatt and Vic arrest Snail who, after some time alone with Vic, agrees to confess and spare the Martin family any further embarrassment. With Nydia's unexpected appearance forcing Vic to keep a lid on his own role in Guardo's death, his suspicions remain despite Ronnie's failure to uncover anything implicating Shane. Then, as Tina bristles after Danny assigns her to a clerical job, Vic has much more to worry about after his daughter, Cassidy, learns about his past misdeeds, including the fact that he fathered Danny's baby. As Vic gets Robert Martin's promise to help out with the upcoming review of his retirement, he still must keep Dutch from learning the truth about Guardo. So, after introducing Cassidy to her new baby brother, he confronts Shane about what happened the night Lem died. Hearing Vic lay out his own suspicions, Shane finally admits to killing Lem in order to keep him from testifying. And while Shane insists that they move on, Vic refuses to forgive him, but does give him the chance to walk away and never return. © 2007 Twentieth Century Fox Film Corporation. All Rights Reserved.