(KMOV)-- A St. Louis County police officer resigns on the same day he is accused of assaulting a prisoner.
According to authorities, on July 18 the officer was with the prisoner inside the precinct office in Valley Park . The prisoner claims that's when he was abused, but there's no information on what, if any, injuries he suffered.
There are cameras in the precinct lobby.
Those tapes have been turned over to the prosecutor.