Case #3: The Temple Street Diner Murders — On the night of Oct. 23, 1986, four people were shot dead inside a diner in Millbrook, New York...

Hi, I’m Crystal, a Senior Editor based in Los Angeles and creator of BuzzFeed’s “That Got Dark” newsletter.

How to play: Read the files, pin your suspects and evidence to the board, connect the clues with string, and make your accusation. You only get one shot — choose wrong, and the killer walks free.