Forever Blue

S4 E10: After a dying convict gives Rush clues to an unsolved cop killing, she reopens the case. Born into a family of police officers, young patrolman Sean `Coop' Cooper worked the streets during a time when tough, not completely legitimate methods of dealing with drug offenders were the norm. When Coop's body was found under a bridge in a bad neighbourhood in 1968, there were a variety of theories.