To do that, the psychologist administers a test — the PCL-R, or Psychopathy Checklist-Revised — designed to measure whether that inmate is a psychopath. This test has incredible power in the American ...

Robert L. Roberson III was scheduled for execution in Texas on October 16. He won a stay, but the case isn't over. He was convicted of the murder of his 2-year-old daughter, Nikki Curtis. The ...

Psychologist Leanne ten Brinke has spent decades studying toxic personality traits. What are the red flags to look out for among workmates, politicians and potential partners?

Gangbuk Motel Murder Suspect Confirmed Psychopath Police expand probe for more victims after suspects psychopathy diagnosis ...