People who live around 44-year-old Kevin Jeffrey Smythe say they rarely saw him but heard his hammering, sawing and an occasional alarm. He lived in one of the four apartments he was renovating for his parents at 306 18th St., and whose entrances he had barricaded with wrought-iron gates and No Trespassing signs.
Authorities say he also booby-trapped the walkway leading to his own apartment: a spring that would fire a shotgun blank when anyone hit a trip wire.”