The court heard how PC Leigh, 54, and a colleague had let themselves in to Mr Holt's flat through the unlocked door and found him sitting in an armchair.

BBC: Pc Neil Bowdery (left) and Pc Maurice Leigh

She was last seen sleeping on the living room sofa near an unlocked glass door of a friend's off-campus apartment after a night of partying.

CNN: Serial rapist suspected in student's slaying

Booth unlocked the door, threw his shawl over the horse's back, and saddled her.

NPR: Excerpt: 'Manhunt'

"We're leaving the back door unlocked and wide open if we're not looking at what's being checked, " Cummock said.

CNN: Congress mulls tightened security for checked baggage