No, Protests Against Police Brutality Are Not Increasing Crime
http://www.thenation.com/article/there-is-absolutely-no-such-thing-as-the-ferguson-effect/
The New York Times recently reported that a couple dozen US cities have experienced increases in murders, and a few others some increase in other violent crimes. While any uptick in serious crime should be of concern, short-term changes in a few crime categories is thin evidence of a sustained national trend. In fact, in most parts of the country, crime in general, and murder rates in particular, continue to go down. While New York City, one site of ongoing protest, had a spike in homicides in the early part of the year, the city just completed the safest summer in 25 years according to Commissioner Bill Bratton. In addition, a new report by the Sentencing Project shows that in St. Louis, the uptick in homicides actually was well underway before the death of Michael Brown.
Even a casual glance at the historical record puts the lie to these claims. When past movements for police reform have emerged in the wake of the Rodney King, Amadou Diallo, or Oscar Grant incidents, there was no appreciable change in crime trends in the specific cities involved, or nationally. Whether these protests took the form of riots, nonviolent civil disobedience campaigns, or sustained community-based protests, crime rates were unaffected. As mentioned before, in some cities the change in homicide rates began before last summers protests, in others the trend continues downward, and in others the trends are mixed.