A corporal for the Oklahoma County sheriff's office resigned Friday after being charged with a felony in allegedly strangling his live-in girlfriend.

"I screamed for help as he dragged me into the bedroom to then sit on top of me, restraining my arms and choking the front of my neck," Jessica Ford wrote in a protective order filed days after the July 26 incident.

Former Cpl. Jason Lee Ledford, 40, of Oklahoma City, is charged with one felony count of domestic abuse by strangulation.

In a protective order filed July 30, Ford wrote she kicked and punched Ledford "out of defense" before trying to escape. She wrote that Ledford choked her until she lost consciousness and that he dragged her by the hair "so hard that he hyperextended" her neck.