The easiest ways to kill the Thief are with the upgraded M1911 (Mustang and Sally) or the Ray Gun and its upgraded variant. In addition, a very large quantity of Claymores can also kill him. On solo, the player can easily down themselves (assuming they have Quick Revive) at the start of the Thief round, and kill him with the Mustang and Sally that is automatically given. However the last option is only best if the player only wants to do this on an early round. It is risky for the player if they plan on going to high rounds, as it uses a Quick Revive the player could actually use when they are downed by zombies.
- Using Insta-Kill will award the player with the Trophy/Achievement, however only a Max Ammo will appear, and not a Bonfire Sale.