Cass provoked serious controversy when, in response to an organized crime scare, he proposed Bill 99, a sweeping amendment to the Police Act, which would have broadened police powers allowing the Ontario Police Commission the right to interrogate and cross-examine witnesses "in camera" in contravention of the traditions established by English Common Law. When queried on the amendments by the press, Cass said "Yes, these are drastic, draconian measures that in some ways are really unbelievable in a country that has an English common law system." The resultant uproar and, in particular, a speech by Liberal MPP Andy Thompson forced Cass to resign from Cabinet on March 23, 1964. Thompson's success buoyed him into the position of leader of the Liberal Party several months later.