Evil is as Evil Does

A self-effacing professor suffers years of verbal abuse. After being scorned, overlooked and ignored at College and home, he decides to leave his wife, children and job, heading off across America. He decides to randomly kill people using an arcane method, leaving no clues and baffling the police and the FBI who are trying to follow the tracks of the killer. The professor's wife becomes romantically involved with a billionaire department store owner who sets his head of security to find the errant husband. The FBI and security chief hook up and jointly pursue the elusive professor but for different reasons. The killer lands in a small town and becomes involved in the lives of the people there and stops killing but the search for him continues. Mishap after mishap dogs the efforts of the FBI and security chief until the FBI in Washington calls off the search. The killer goes back into teaching until....