S1·E25 Charlie, He Couldn't Kill a Fly

An alcoholic, loudmouth, unemployed man on the verge of losing his wife and son is arrested for murder. He actually is a witness to who committed the crime but no one except a family friend believes him to be innocent. He becomes a hero to his neighbors as the murdered man was a drug dealer and begins to revel in the glory. When his friend finds the real killer it may be too late as the "hero" is now fully prepared to go to prison.