By Derrick Nunnally
The Philadelphia Inquirer
MONTGOMERY COUNTY, Pa. — An off-duty SEPTA police sergeant shot and killed a neighbor Wednesday night in Perkiomen, and prosecutors were weighing the officer's claim of self-defense against a man known to have a long arrest record.
The slaying rocked their close-knit Montgomery County subdivision, where residents said the slain man had threatened several families on the otherwise peaceful cul-de-sac of two- and three-story houses in recent months.
Pa. man killed by off-duty sergeant