WASHINGTON (AP) - Looks like Chris Brown's assault case in the nation's capital is headed toward trial. Lawyers for the R&B star say the singer has rejected a plea deal in the case. Prosecutors had agreed to let Brown plead guilty to the misdemeanor assault charge he faces - but during a hearing in Washington D.C. yesterday, Brown turned the offer down. One of Brown's lawyers says the singer rejected the deal because he isn't guilty. Prosecutors see things differently. They say they would be turning over what they call substantial video surveillance soon. But they didn't say what the video shows. Another hearing is set for February 20 - and it's expected a trial date will be set then. Brown is on probation for the 2009 beating of Rihanna. He's already has had his probation revoked because of the D.C. case - but the judge in Los Angeles handling that case has allowed him to remain free to attend rehab and do community labor.