Serial killer Ted Bundy had a chameleon-like ability to deftly change appearances—whether physically or with the help of costumes and props—which helps explain why the vicious killer was able to evade police for so long.

Dressing in disguise is a time-honored Halloween tradition where self-expression and secrecy often meet. But costumes can also serve a much more sinister purpose. Learn about murderers who literally dressed to kill.