When Los Angeles cops busted through Mae Phillips' front door last month looking for her grandson, they blew out the door jamb, ripped out casing and drywall, and left the shattered remains hanging by the hinges. But just as sometimes happens in the movies, the suspect wasn't there - and Phillips became the unwitting victim in a real-life police raid seeking members and associates of a Venice street gang. Enter LAPD's little-known "Wrong Doors Unit" - also known as Mark Jenkins. "Mistakes do happen now and then," said Jenkins, a civilian carpenter with the Los Angeles Police Department. "We're just...