From Reason:

Every petty excuse for the police to bother you is a loose trigger for further injustice. Roosevelt Twyne, a 25-year-old security guard who is African American, is learning this in New Jersey.
Pulled over last month on his way home from work in Roselle Park, New Jersey, for having tinted windows on his car, Twyne informed the police he had his work-related weapon in his possession. The police arrested him, claiming he was carrying both an illegally transported gun and illegal hollow-point ammunition.