A former Berkeley County detention officer was arrested Thursday after an assault on an inmate last month.

Agents with the State Law Enforcement Division arrested Thomas Justin Mims, 28, and charged him with third-degree assault and battery, according to SLED. He was booked into the Berkeley County jail.

About 5 a.m. Aug. 19, Mims shoved inmate Anthony Ray Williams with his shoulder, pushed him against a wall and hit him in the face, causing swelling and bruising, according to the arrest affidavit. The assault was captured on the jail’s video system. The use of force was not necessary and was excessive, according to the affidavit.

The Sheriff’s Office asked SLED to investigate.

The charge is a misdemeanor that carries a fine up to $500 or 30 days in jail or both.

Mims is no longer working as a detention officer, according to the sheriff’s office.

Williams was in jail on a charge of grand larceny, according to Berkeley County court records.

Reach Dave Munday at 937-5553 or follow him on twitter @dmunday.