Avilla pressures Stretch to provide evidence against Peck in return for immunity from prosecution. Avilla's marriage starts to wilt due to his increased obsession with the case, and Peck insinuates he will make advances on Avilla's wife, Kathleen. Stretch calls Penny and tells her that he will testify, unaware that Peck is having sex with her at that very moment. During a routine patrol in Huntington Park, Stretch is shot through the chest in a hit staged by Peck. Peck murders the gunman but the van used in the hit speeds away, indicating a witness to the crime. When Stretch is revealed to be alive, Peck strangles him but makes it look as though he's holding on to a dead friend when his partners arrive. Avilla and Wallace set up a sting to catch the witness, but two SWAT units arrive on the scene after the sting is leaked. Fletcher and the witness, Demetrio, are killed in the resulting shootout. As he dies in Avilla's arms, Demetrio identifies Peck as Stretch's killer.