The odds of this happening in the US is slim as I have probably a dozen friends that are police officers, fire fighters, and various government agents from FBI, CIA to SS all within the same group, and let's just say there are some unsavory individuals in the group too, including myself working in Adult and being part of almost all their background checks.
Plus, it seems Canada is pretty strict on these things....
http://www.pardons.org/pardons-canad...ar-pot-charge/