Interpreting Denver’s drime rates before and after pot legalisation

“In May 2013, Colorado legalised the manufacture, sale, distribution, and use of recreational marijuana. In May-June 2013, crime rates in Denver for simple assaults, intimidation, disorderly conduct/disturbing the peace, family offenses/nonviolent, liquor law/drunkenness, violation of a restraining/court order, and criminal trespassing went through the roof.”