(Dispensaries and Crime) "The cross-sectional results suggest that dispensaries are not associated with crime rates; however, current media and policy efforts have focused their attention on the place-based regulation of these dispensaries to protect the public against crime (California Police Chief’s Association, 2009; City of Los Angeles, 2010; Lopez, 2010). Based on the limited evidence presented by this study, it is unclear if place-based policies will be effective."

Source

Kepple, Nancy J. and Freisthlere, Bridget, "Exploring the Ecological Association Between Crime and Medical Marijuana Dispensaries," Journal of Studies on Alcohol and Drugs (Piscataway, NJ: The State University of New Jersey Rutgers, July 2012) Volume 73, Issue 4, p. 529.
https://www.ncbi.nlm.nih.gov/…
https://www.ncbi.nlm.nih.gov/…