Exhibit A: Secrets of Forensic Science S01 E03 Trace of Paranoia

Shortly after a young working student moves into a new apartment, she suspects someone has been visiting when she's not there. To quell her suspicions, she places a bottle just inside the door as she leaves for work. When she returns, the chain is still on the door, but the bottle has been moved. She gets the shock of a lifetime when a stranger is found dead in her bathtub.