When Mitt Romney was a college freshman, he told fellow residents of his Stanford University dormitory that he sometimes disguised himself as a police officer – a crime in many states, including Michigan and California, where he then lived. And he had the uniform on display as proof.

So recalls Robin Madden, who had also just arrived as a freshman, the startling incident began when Romney called him and two or three other residents into his room, saying, “Come up, I want to show you something.” When they entered Romney’s room, “and laid out on his bed was a Michigan State Trooper’s uniform.”

Other eyewitnesses have previously recalled Romney’s alleged use of a police or trooper uniform in pranks during his high school years at the exclusive Cranbrook School in Bloomfield Hills, Michigan.

Phillip Maxwell, a prep school buddy, told the New Republic in 2008 that Romney had pulled over students from a girls school next door to Cranbrook while wearing a police uniform as a prank. Other former classmates described Mitt as a “happy-go-lucky guy known less for his achievements and more for his pranks.”

In The Real Romney, a biography published by Boston Globe reporters Michael Kranish and Scott Helman this year, another former friend recalled how Romney had “put a siren on top of his car and chased two of his friends who were driving around with their dates.” The two friends were in on the scheme, but the girls were not. There was beer in the car trunk, according to a prearranged plan. Mitt told his two counterparts to get out of their vehicle and into his car. Then they drove off, leaving the girls behind.