The burglar
She opened the back door and let the dog go out first. In her mind she was going over the examination over and over again. How many answers were correct for sure, how many were pure guesses? She didn't notice the man that went into her back yard right after she left it. He quickly ran to the back door. It was open so he went in looking for valuables. The dog did it's thing and it started to rain so she led him back home in a hurry and locked him in his bench.
As she went in she noticed that drawers were open and her handbag was turned upside down on the sofa. She heard a rumble on the upper floor. She ran up the stairs. As she got into her bedroom a masked man was going through her underwear drawer. She started cursing, the man turned around and attacked her. He grabbed her throat and threw her onto the bed. Immediately he was on top of her and smacked her in the face growling : "If you scream, you are dead" and showed her an old fashioned razor (the flip open kind). She nodded yes yes yes and mumbled "sorry".