Thought experiment!
"OK, guys," Mandy said, sitting down in the break room. "I have a thought experiment. Here's the scenario: passing the locker room, I catch sight of a bare foot lying on the ground. I walk into the locker room and see that the foot belongs to Aiden, who is dead and lying sprawled on her back in a pool of blood. Her shirt has been yanked open and there are scattered buttons on the floor around her. She is not wearing shoes, though one strappy stilleto is sitting upright on the floor near her head. Who killed her, and how?"