: The murderer is revealed to be the victim’s son, Ian Percy . Ian had been having an affair with Lily, only for Hollis to reveal that Lily was actually Hollis's illegitimate daughter—making her Ian's half-sister. During the ensuing argument, Ian killed his father to keep the secret quiet. Subplots & The Red John Arc

While the team handles the murder, a parallel storyline focuses on Homeland Security agent 's obsession with Patrick Jane. Red Letter Day | The Mentalist Wiki | Fandom

The CBI team is called to a run-down Western-themed town after its owner, , is found dead in his home. Suspects & Red Herrings :