According to a 2014 study by the American Research Association, when sixty (60) white police officers were asked to view head shots of young white men and equally young black men, the officers thought the white men to be on average one (1) year older than their actual ages.  They thought the black young men to be five (5) years older than their actual ages.

The young men in the photos below were asked why someone might think they are five years older than they actually are.