In Season 4, Episode 4 of The Mentalist , titled the story follows two parallel investigations during a political rally in Sacramento. Plot Overview

Concurrently, Kimball Cho and Wayne Rigsby discover the body of a photographer, Scott Gibson , in a nearby alley. While a homeless man named Willie Shubert confesses to the murder, Lisbon remains skeptical of his guilt.

[Mentalist Rewatch] 4x04 Ring Around the Rosie : r/TheMentalist

This episode introduces Luther Wainwright , the new, youthful Special Agent in Charge of the CBI.