According to the Denver city data, there were 19 murders in the Denver city area through May last year, and 11 this year. That's better, but implying that to be a statistically significant phenomenon related to marijuana legalization seems intellectually dishonest. Especially when the overall crime numbers for more common crimes don't seem to show any consistent patterns.

http://www.denvergov.org/Portals/720/documents/statistics/20...