War Relief (2) - S2.E4

Rivers goes it alone to try and track down Keller, but the killer's one-man rampage results in two further murders and two further attacks, including his wife and partner. When a personal note is delivered to the station, and the family of one of the young murder victims participate in a press release, Keller goes on the rampage with a gun at the young boy's funeral. During a shootout, Rivers is gunned down. Taylor wonders if she pushed him too far.