The following are known Action Replay Codes for Crime Killer on Sony Playstation (PS1).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay, CodeBreaker & GameShark

Infinite Shields for the Car
801aa78800ff

Infinite Shields for the Motorcycle
8019ce5000ff

Infinite Shields for the Plane
801a054000ff