"Where did the murder take place?" Detective Lik Gumshoe, your partner on the case, asks sternly. The victim is a young woman, about 32 years old. She was killed with something sharp, most likely a knife. The strangest thing is that the killer left no clues that could help the investigation. But you already knew who he was. You saw him every day in the mirror.

You look around the room you've been to before and look at the body that was once familiar to you. No one knows that you knew this victim, and no one should find out. You go down to the body to examine the evidence that you, of course, did not leave. But suddenly your attention is drawn to something that no one should notice - your own fallen hair. If someone sees it, you will not escape exposure.

The solution comes instantly: hide the evidence. With a quick movement, you pick up the hair from the victim's neck and discreetly hide it in your pocket.

You stood up and made eye contact with Detective Gumshoe. He was looking at you with wide eyes. "What was that?" he asked, seeing your sudden movement.