Jorge Gama-Lobo is the first, and for a while sole, suspect in "Lights, Camera... Homicidio", if only because the cameras were rolling to capture him plunging the knife into his fellow actor.
Shawn, however, notes Jorge's look of shock upon reviewing the footage and becomes convinced that he did not, in fact, know what he was doing – someone else must have replaced the prop with a real knife. By the time Jorge himself is the victim of a near-fatal attack he has bonded with Shawn and Gus so much that they are the only people on his 'friends and family' list for acceptable visitors at the hospital. Kelly is eventually arrested for the spate of attacks, and Jorge presumably slides back into life on the telenovela.