Hawaii Five-O Season 5 Episode 4

During a traffic stop in the boonies, the driver slips out a concealed handgun and shoots the HPD officer down in his tracks. Before dying, the cop gets off a couple of rounds at the fleeing car, causing it to crash. McGarrett and Danno visit the killer in the hospital, where he still couldn't care less about murdering a man ("I chopped a cop ... put a pig in a blanket").