POCATELLO, Idaho (AP) — A nine-year veteran of the Pocatello Police Department, who was charged with unnecessary assault by a police officer last month, has resigned.

The Idaho State Journal reports Detective Steven Westfall had been placed on paid administrative leave since last month. His attorney, James Ruchti, says the resignation will not affect the case against him. Westfall has been charged with assaulting James Rutherford on July 10. Pocatello police had responded to an IRS office after Rutherford refused to submit a search and was asked to leave the building.

Video from a police dashboard camera shows Westfall hitting Rutherford's head with his elbow as Rutherford was handcuffed and in the custody of other officers. Westfall is due back in court Thursday. He pleaded not guilty to the assault charge last week.