Quiet serial killers may hide in plain sight as DNA unmasks dead 1970s Pennsylvania strangler, expert says

Quiet serial killers may be hiding in plain sight, an expert warns, after new DNA technology helped unmask a Pennsylvania man authorities say killed at least two women in the 1970s. At a Thursday news conference, Pennsylvania State Police identified…

Read MoreQuiet serial killers may hide in plain sight as DNA unmasks dead 1970s Pennsylvania strangler, expert says