Calls to 911 Emergency in Milwaukee, Wisconsin, fell by about 20 percent—22,00 to be exact—following one of the most violent police assaults in Milwaukee history, an episode that has implications for cities across the country as well. According to the Milwaukee Journal-Sentinel: That dropoff in 911 calls suggests the incident eroded trust and sharply damaged the relationship between the police and neighborhoods that often count on them the most, according to the study. Controlling for crime and other factors, researchers found that 911 calls dropped by approximately 22,000 citywide over the following year, with the effect much higher in black neighborhoods … As 911 calls dropped, the city experienced a surge in homicides later in 2005, leading the authors to suggest the lack of reporting of crimes by citizens may have contributed to the spike in killings. The researchers found another drop in 911 calls in predominantly black neighborhoods after the beating of Danyall Simpson by a Milwaukee police officer.