His wife, Olive, was herself the daughter of a former provincial politician, William H. Casselman, who represented Dundas as a United Farmers of Ontario member from 1919 to 1923.

While he was Attorney-General, Cass continued to practise on the weekends as a small-town lawyer in his hometown of Chesterville and another office in nearby Winchester, where his mother lived.

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.

Following his re-election in the 1967 general election,[2] Cass was rehabilitated by being chosen Speaker of the Legislative Assembly of Ontario once the body reconvened on February 14, 1968.