A young couple makes a video at a toxic lake, at 2:08 you can see a suspicious object in the lake. One year later the police confirm it was a suitcase with a human body inside. This video was used by police to locate the suitcase.

https://www.youtube.com/watch?v=z1FAiYrCScM&lc=z23zxt1xrxunyxyg004t1aokg510lquh5gmn5b54kudfrk0h00410.1556712833301610 via /r/videos