Enforcing Prohibition

An interesting submission from a reader (thank you M.M.!) It's prohibition time in Alberta (enforced between 1916 and 1924) so this October 1922 photo was taken late in the game. 
It appears the Alberta Provincial Police constables are proudly displaying a big haul of illicit booze seized on a freight train near the Alberta border.  As Prohibition in BC ended in 192, the whiskey must have been travelling east into the province.