Ultimate Clue by Nikolas Mavresis

14 strangers meet at a party. Spectator decides on a killer. Without touching the cards, you immediately know who the killer is. Comes complete with the 14 suspect cards, a prediction card for the bonus routine plus 10 stickers.

Bonus routine: Killer On The Pateo

After the spectator shuffles the suspect cards, they decide which people to kill until they are left with the survivor (or the person who killed them all). It is no surprise that you have predicted that right at the start of the routine.