In our exclusive clip from 'Ed Kemper', the serial killer explains why he killed his grandparents all those years ...

The FBI were forced to change the way they interviewed serial killers after one made a horrifying threat to an agent ...

"Ed Kemper is still dangerous. He remains a high risk," Rosell said. Kemper received a psychiatric evaluation in April, where it was deemed he was at "high risk" to reoffend. One incident the ...