Most masked robbers opt for a balaclava to hide their identity, while others use bags or even underwear.
41-year-old Henley Stephenson eluded police for more than ten years thanks to an extraordinarily lifelike latex mask, which turned him into a white skinhead.
Officers discovered that their man was in fact black when they finally caught up with Stephenson after a string of armed raids dating back to 1999.
And Police believe the mask may have been used on several different occasions and have asked colleagues to look into unsolved cases involving a white robber.
Stephenson, of Westminster, central London, was jailed for a total of 14 years at Wood Green Crown Court today.
He pleaded guilty at a previous hearing to 20 counts of robbery and five counts of possessing a firearm.