Liver Let Die Picket Fences : Season 4 Episode 20

Jimmy learns he might have a cancerous growth on his liver. At the same time, he investigates the murder of a homeless man found behind Reverend Novotny's church. The murder suspect grabs Jimmy's gun and holds him hostage at the sheriff's office, but Jimmy and Kenny convince the man to give up the weapon. Later that day, Jimmy learns that the growth on his liver is benign.