Shaggy is the Man Behind the Slaughter (Silly fnaf au idea)

After so many years of solving mysteries and always being used as bait along with his pal Scooby Doo, unlike Scooby... Shaggy had enough of it and by the time the whole crew went to England after hearing another mystery was going on, Shaggy then had a brilliant idea to fake his own death after he "mysteriously" vanish...