Across the city, black people were arrested on low-level marijuana charges at eight times the rate of white, non-Hispanic people over the past three years, The New York Times found. Hispanic people were arrested at five times the rate of white people. In Manhattan, the gap is even starker: Black people there were arrested at 15 times the rate of white people.

With crime dropping and the Police Department under pressure to justify the number of low-level arrests it makes, a senior police official recently testified to lawmakers that there was a simple reason for the racial imbalance: More residents in predominantly black and Hispanic neighborhoods were calling to complain about marijuana.

An analysis by The Times found that fact did not fully explain the racial disparity. Instead, among neighborhoods where people called about marijuana at the same rate, the police almost always made arrests at a higher rate in the area with more black residents, The Times found.