T. J. Hooker - Season 2 Episode 3
The Empty Gun

Two armed juveniles rob a liquor store, and the ensuing Police pursuit results in an Officer being shot dead. Romano waits until the killer is out of bullets before he corners and apprehends him, resulting in a number of Officers being angry at Romano for not avenging their colleagues death. Hooker is torn as his partner is slated for going by the book and not taking the opportunity to shoot the cop-killer...