Sulaimon Brown, the former mayoral candidate at the center of probes into Mayor Vincent C. Gray’s campaign and hiring practices, was in court once again Tuesday.

Brown appeared on charges that he failed to obey police and was driving on a suspended Maryland license during an early morning traffic stop last month. Brown, an unemployed auditor, refused to get out of his vehicle when he was stopped by an unmarked car with plainclothes officers, according to police.

On Tuesday, Magistrate Judge Richard H. Ringell ordered Brown to return on Nov. 14 for a trial before another judge on the suspended license.

Prosecutors had dropped the failure to obey charge but told the judge they would pursue a case on the suspended license.

In discovery provided to Brown, prosecutors are looking a police placard he had in his car during the stop. (Brown, who has worked as a security guard and as an officer at the University of the District of Columbia, has said he bought the placard at the FOP gift shop.)

Though Brown cited a District residence, he had a Maryland license suspended for unpaid tickets in the District. Brown said he has since paid the tickets.

Ringell, however, suggested that Brown get a valid District license before returning to court.

Ringell told Brown that if he was stopped a second time without a valid driver’s license, he could get 90 days in jail and a $300 fine. Prosecutors could also seek a contempt of court order, carrying 180 days in jail and a $1,000 fine, Ringell said.

Brown, a former minor mayoral candidate, has alleged that the Gray campaign paid him for disparaging then-Mayor Adrian M. Fenty during last year’s election. Brown also alleges that the Gray campaign offered him a city job for his attacks on Fenty.

The mayor and senior campaign staff members have denied any wrongdoing related to Brown’s allegations. The claims by Brown have led to a congressional investigation and a probe by the U.S. Attorney’s Office.