Question

According to hickey half of all serial killers in the united states have emerged since what year

Answer 1

1975

A serial killer is a person who murder three of more people. With no apparent motive, he commits a series of murders following a predictive behavior pattern.

According to Dr. Eric W. Hickey, a popular forensic psychologist who studies psychologists, roughly half of all identified serial killers in the United States have surfaced since 1975.