FIRST POSTED: SATURDAY, MARCH 19, 2016 05:53 PM EDT | UPDATED: SATURDAY, MARCH 19, 2016 06:05 PM EDT

Dr. Colin Mangham says the research into the impact of Vancouver's safe injection site, InSite, is "weak."

Drug intervention experts and law enforcement officials who lived through the Vancouver safe injection site experience insist there was no decrease in either overdoses or drug-related crime.

Dr. Colin Mangham, a researcher and consultant in drug prevention for 37 years, told the Sun from B.C. last week he was “shocked at how weak” the research was into the effectiveness of InSite, the safe injection site set up in 2003 by Vancouver Coastal Health in the city’s Downtown East Side.

Mangham says the 30-35% reported decline in fatal overdoses among those using InSite was subject to “interpretation bias” — meaning the same people who created the program did the research on it.

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