In short, not much. From the article, “evidence of a measurable impact of casino gambling on crime is inconclusive.” And, “While there may be a perceived increase in crime by the public, it cannot be attributed directly to the state’s casinos.” However, it seems clear that the researchers here looked hard to find a link and are no friends to Indian gaming. It appears their research started with the 1999 National Gambling Impact Study Commission Report — anti-tribal gaming as anything — and went from there.