Bulletproof is a Murderer Ability that allows the murderer to survive one direct shot from the sheriff, making it harder to kill the murderer. However, the second shot will kill the murderer. Bulletproof costs 12 credits per round as murderer and 500 credits to buy permanently. Bulletproof also works in Murderer Madness, and is often known as the most useful Murderer ability in-game.
"Keeps you alive after being shot for the first time."