Shot (1973)

Semi-urban detective duo Ross and Wilson have been charged with taking down local drug kingpin, Blasi. After busting a low-level pusher, they convince his girlfriend, Sheila, to start working for them as an undercover operative in exchange for avoiding prison. But as Ross finds himself becoming romantically interested in his new, perpetually spaced out informant, Blasi continues to strengthen his crime empire, setting his sights on even loftier, and deadlier, ambitions.