Invision/AP 1 / 3

LOS ANGELES (AP) -- Rihanna's attorney says she will appear at a hearing next month as a possible witness in the assault case against Chris Brown.

Donald Etra says prosecutors have told him Rihanna will receive a subpoena to testify during a preliminary hearing in Los Angeles on June 22. He says she will comply with the order.

A judge on Thursday rejected a motion by Brown's attorneys to receive police and investigative records in the case. The judge told attorney Mark Geragos the motion was premature and he could file it again after the preliminary hearing, which will determine whether there is enough to continue a case against Brown.

Brown hasn't been in court since entering a not guilty plea in April.