02E14 - Blood in, Blood Out

Cho is summoned by a police detective to identify a gang member from his former gang Avon Park Playboys. Patrick Jane goes with Cho, who identify the man as David Seung that was his friend in the past. The grandmother of the victim, Suanne Seung, goes to CBI and asks Cho to investigate the murder case since her grandson was regenerated and was working after serving sentence in the prison, but Cho refuses. Out of the blue, Cho and his girlfriend Elise Chaye are assaulted at her home by two men wearing hood and Cho decides to find the responsible forgetting that he is an agent of the law, with the support of Patrick Jane, and finds that his friend had changed indeed.