"Over the past two decades, clear and convincing evidence has been collected from multiple studies showing that effective treatment of opiate dependence markedly reduces the rates of criminal activity. Therefore, it is clear that significant amounts of crime perpetrated by opiate dependent persons are a direct consequence of untreated opiate dependence."

Source

National Institutes of Health, Office of the Director, "NIH Consensus Statement: Effective Medical Treatment of Opiate Addiction," (U.S. Department of Health: Bethesda, MD, November 1997) Vol. 15, No. 6., p. 12.
http://consensus.nih.gov/1997…