(NEW YORK) -- New York City's Police Commissioner Bill Bratton is expected to voluntarily resign on Tuesday, city officials said.
The resignation comes as a surprise, as Bratton was expected to stay on through next year's mayoral election, officials said.
Bratton has twice served as New York City's police commissioner. He's also been the Los Angeles police chief and the Boston police commissioner. He's the only person who has led both the New York and Los Angeles police departments.
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