Los Angeles police officer Karen Smith says Brown walked into a station around 7 p.m. and was being interviewed by detectives. Smith said he was not in custody.
Police say the 19-year-old singer and a woman were in a vehicle in the Hancock Park neighborhood early Sunday when they began arguing, and the argument escalated when they got out of the car.
Police say the woman identified Brown as her attacker, but he was gone by the time officers arrived.
Both Brown and his girlfriend, fellow singer Rihanna, were no-shows for Sunday night's Grammy Awards. Both were nominated and scheduled to perform.
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