Police Chief David Erwin called the Solidarity Sing Along an “unlawful event.”
The warnings continued for a about a week and then arrests were made.
The singing comes in the wake of a July 8 ruling by U.S. District Judge William Conley that the Capitol Police’s requirement for a permit for any gathering of four or more people is unconstitutional.
Conley ruled that the police could only require a permit for groups larger than 20.