Douglas County prosecutors Wednesday dismissed a case against a 23-year-old Lawrence man accused of robbing a convenience store in July.

Cordero P. Riley was charged in October with aggravated robbery. Prosecutors accused him of covering his face with a T-shirt and using a handgun at 3:30 a.m. July 23 to rob a clerk at Kwik Shop, 845 Miss. A preliminary hearing was scheduled Wednesday, but Michael Allen, an assistant district attorney, asked to dismiss the charge without saying why.

District Judge Sally Pokorny denied a request from defense attorney Branden Smith to have Allen specify whether prosecutors were having problems with potential witnesses in the case. Pokorny dismissed the case without prejudice, meaning prosecutors could refile charges later.

Riley still faces a misdemeanor theft case in which prosecutors accuse Riley of using a stolen credit card three weeks earlier at the same Kwik Shop. Riley has already spent time in jail for a battery and indecent exposure in a Lawrence Municipal Court case in which he was accused of striking a 31-year-old Tonganoxie woman in the face — while he had his pants around his ankles — on May 4 inside Dollar General, 1811 W. Sixth St.

Because the robbery case was dismissed, Pokorny lowered Riley’s bond from $35,000 to $1,500.