The officer then arrested Wilkins for disorderly conduct, handcuffed him, and transported him to a police station where he was "detained for an extended period" and then released with a citation.
On May 7, Municipal Court Judge Gerard Kosinski dismissed the case. Noted civil-rights attorney Paul Messing filed the lawsuit for Wilkins a week later.
Wilkins' arrest came one day after police arrested Anthony Riley, 20, for singing in Rittenhouse Square. He also was charged with disorderly conduct and has a court date next week.
The Riley arrest was part of a controversial crackdown by police on musicians and performers in Rittenhouse Square based on complaints from nearby residents.
City Solicitor Romulo Diaz, responding to an outcry from some who called the Rittenhouse Square crackdown extreme and an infringement of freedom of speech, said this week that he will take comments next month in an effort to reach a compromise.
Diaz declined to comment on the lawsuit.
Contact staff writer Robert Moran at 215-854-5983 or bmoran@phillynews.com.