Four Unsolved Mysteries That Defy Logic

A killer murders six people with a pickax, then lives in their house for three

days, feeding the animals and eating their food. A doctor vanishes

the day before 9/11, and we still don't know if she's a victim or something darker.

Over 600 dogs have jumped from the same bridge spot in Scotland. Some survivors climb

back up to jump again. And a woman is found dead in a locked water tank on a

hotel roof, after security footage shows her hiding from something invisible. These aren't campfire

stories. These are real unsolved cases, and by the end of this video,

you'll understand why investigators have given up trying to solve them. This is Mindvale.