Hi, Recluse100...thanks so much for the "Liberals under Louis St. Laurent saw fit to ban "crime comics" statement.  I had no idea!  So, I did 15 minutes digging.

#1: Banning comics wasn't a Liberal government cause.  It was a Conservative member's cause.  So, St. Laurent, while PM, had no influence.
 
#2: The 1949 "ban" was a private members bill by Conservative MP (Kamloops, BC) E. Davie Fulton, who went on to be Minister of Justice in the 1957 John Diefenbaker government.

#3: Fulton was influenced the work of Victoria, BC anti-comic crusader Eleanor Gray, the school district's Parent Teacher Council (the USA's  "PTA") and the actions of two Dawson Creek kids.  The kids stole a rifle, shot at a passing car--killing the passenger.  BC people were shocked. Social Services discovered (uh-oh!) the kids had stacks of...CRIME COMICS!  

#4 Fulton's criminal code revision--Bill 10--was passed and censorship became law, despite the comic industry's efforts.

Amazing stuff...thanks again.