 The RCMP was also the force used to stop the On-to-Ottawa Trek by precipitating another bloody clash that left one Regina city police officer and one protester dead in the 1935 Regina Riot.The Mounties were frequently criticized for these activities by labour and the left, including one of its most prominent surveillance targets, Member of Parliament J. S. Woodsworth.A dispute with the Government of Alberta over prohibition led to the creation of a separate Alberta Provincial Police from 1917 to 1932.