The arrestees were mainly Quebeckers who traveled to Toronto for the summit, and billeted at a gymnasium in a U of T building. Early on the morning of Sunday, June 27, police raided the building and rounded up nearly 100 people. They were charged with conspiracy to commit a criminal act. Police did not obtain a warrant because they thought they did not need one. The Crown decided otherwise, and dropped all charges related to the June 27 arrest.

Faced with numerous complaints and pictures which showed Toronto Police not wearing their badges as required, the Toronto Police launched an investigation and identified nearly 100 officers who were not wearing their name tags. The officers now face disciplinary measures of lost days pay.

"The entire system of police accountability turns in large measure on individuals who believe they have legitimate concerns having an ability to address those concerns with some certainty. If police or anyone in a position of authority has the ability to not disclose their identity, it raises a series of concerns both for the individual involved but also on a broader, societal level," said Toronto lawyer Eric Gillespie, who's heading up one of two class actions related to the G20.