Two girls, Julia and Sandra went to a party. At the party Julia got pretty drunk, but Sandra was relatively sober. As it often happens, the sober one had to accompany her tipsy friend home.
Upon entering Julia’s apartment, Sandra put her friend in bed. Wishing her good night, she turned off the light, closed the door and went home. Soon Sandra suddenly realized that she had forgotten her purse with the keys to her apartment at Julia’s. She returned to Julia’s, but decided not to turn on the lights in order not to wake up her friend. She groped her purse, which was lying on the couch in the living room, and left the apartment.
The next day, Sandra received a call from the police and was asked to come to the station. At the police station they showed her a couple of photos. Horrified, Sandra recognized Julia – she was lying on her bed with her throat cut. The policeman showed Sandra a piece of paper that had been found on Julia’s bed. It said:
"YOU’RE LUCKY YOU HADN’T TURN ED ON THE LIGHT – OTHERWISE I’D HAVE HAD TO KILL YOU TOO".