If this is a true and factual account, (there is no reason to suspect it is not) then there had best be some heads mounted on the Attorney General's trophy room wall before long. Scotty Boman, former US Senate candidate and current candidate for Detroit City Clerk underwent an assault on his person July 30, and his rights were violated by those who pledge to serve.  According to the Michigan Libertarian website:

Campaigning has become dangerous for Detroit City Clerk candidate Scotty Boman. According to Boman, a member of the WCCCD campus police attempted to intimidate him while he was taking pictures of his opponent's (Janice Winfrey) signage at the early voting location at the Northwest Campus of WCCCD on Tuesday July 30th. After he moved to where volunteers for other candidates were handing out literature, he was assaulted by the officer, then thrown to the ground by additional officers as he attempted to hand campaign literature to a passers-by. Boman said he was then held prisoner until a campaign forum, that the officers knew he was scheduled to attend, was nearly over.

"As soon as I took out my camera and pointed it at Janice Winfrey's banner (which was draped over the voting location's entrance) this one officer stormed out of the polling place and shouted, `What do you think your doing!' I responded that I was taking a picture of the banner." Boman went on to say, "I then went to take a picture of another nearby sign that read `Vote here Janice Winfrey City Clerk.' At this point a poll-worker, came out to where I was taking the picture. I started recording video of our conversation regarding Winfrey's signage when the Officer who previously shouted at me came out and told me to put away the camera. I asked if my photography was illegal, and which law it violated. I emphatically stated that I would follow her instructions immediately if she asserted I was breaking the law, but she could not cite any."

After he was detained in a closet by police.  

Trespassing?  On publicly owned property?