Black Americans are 3.23 times more likely than white Americans to be killed by police, according to a new study by researchers from Harvard T.H. Chan School of Public Health. The researchers examined 5,494 police-related deaths in the U.S. between 2013 and 2017. Rates of deadly police encounters were higher in the West and South than in the Midwest and Northeast, according to the study. Racial disparities in killings by police varied widely across the country, with some metropolitan areas showing very high differences between treatment by race. Black Chicagoans, for example, were found to be over 650% more likely to be killed by police than white Chicagoans.