Two college roommates were complete opposites, one liked to study while the other liked to party. In preparation for their upcoming midterms, the studious roommate (Jane) planned a Friday night of studying while the partier (Mary) decided to go to a frat party.
The two were friends, regardless of their differences, and while Mary got ready for the party, she tried to get Jane to go. Jane insisted on studying and Mary set out for the party. Jane agreed to leave the door unlocked, so that Mary wouldn’t have to bring her keys.
While Mary was at the party, she met up with another group of friends and they convinced Mary to stay at their place for the night. Mary agreed but had to stop back at her room to get her keys. It was about 2 a.m. when Mary got back. She snuck in and grabbed her keys, leaving the lights off, not wanting to wake her roommate.
The next morning Mary walked home, intent to ask Jane for some study help. When she reached her room and opened the door she saw Jane murdered at her desk! Written on the wall in Jane’s blood was "Aren’t you glad you didn’t turn on the light?"
