Tony Muller is a character who is portrayed by Larry Clarke. Tony is Juror Number Four is the Lyla Addison murder case, the one at the heart of "Law & Murder". When his fellow juror Joe McUsic is poisoned, Tony figures he's "marked for death" and makes a run for it, only to be picked up and brought in for questioning by the cops. The simple fact and act of fleeing bumps him up the suspect list, but when Beckett and Castle sit down with him in the interrogation room, his terror comes across loud and clear.