On Monday, off-duty LAPD officer Fernando Arroyos and his girlfriend were out in South L.A. looking at houses, in anticipation of getting married and settling down there. Sure, it was after dark, and most Angelenos do not venture out at night these days, but Fernando was LAPD, highly trained in police work and educated at U.C. Berkeley, and thought he had it all down. Then four gangbangers from the local crime organization (too highly advanced to be called a gang), Florencia 13, saw the silver chains around his neck and decided to rob him. Arroyos told his girlfriend to run....