Nearly every single day, people take to running trails, tracks and city streets in their quest to maintain their physical fitness.  However, predators are out there looking for just the right female to attack who is by herself.  This episode is in two parts highlighting three different killers.  Part one covers one killer, and the remaining two offenders are discussed in part two.  Although they were apprehended relatively quickly, had they remained free I'm certain they would have continued to stalk and kill more women.