Good guy from Samaria

A "Good Samaritan" is one of those back-handed compliments, like saying "He's a good guy for trailer trash."  People from Samaria weren't expected to amount to anything.  Anyway, here's an inspiring Good Samaritan story that sounds like the people involved are all being awfully discrete, um, that is, of course I mean to say "discreet."  A state trooper trying to come to the aid of a woman ejected from a car in a highway accident comes under deadly attack from a guy who may have been behind the wheel.  A passing motorist stops and, hearing confirmation from the trooper that, yes, he sure does need help, shoots and kills the attacker, then promptly and correctly uses the trooper's radio to bring help to an accurate location.  The trooper's boss expresses his appreciation while carefully avoiding the release of any information about the hero, who sounds like a man who's been around the block a few times and is instantly being treated like a real or honorary insider.  Good on him, and on the state troopers, too.