In the Lowe case, news stories said, a thug named Loren Manning Jr., accompanied by two other thugs, jumped Lowe on a city street last October. Lowe, 57, is a disabled and retired Marine, who has had two strokes and two heart surgeries and wears a pacemaker. Manning and his sidekicks attacked Lowe and witnesses said Manning chased him and tried to clobber him with a metal pole before catching him and pinning him to the ground, where Lowe managed to retrieve a small pocket knife and used it to stick Manning, who, tragically, died. This is Philadelphia, mind you,...