In his early 30s, fresh off his release from prison on rape charges, Timothy Krajcir enrolled in college to study psychology and the criminal justice system.
Like other students, Krajcir was seeking self-enlightenment, a detective said.
But over the next six years, Krajcir murdered at least six women in two states, covering up his crimes in part by using what he learned at Southern Illinois University, authorities said.
"He said initially he was trying to figure himself out. But he failed, obviously," said James Smith, a Cape Girardeau police detective who helped link Krajcir to five homicides here dating back 30 years.