LAWTON, Okla. (AP) — Charges were filed this week against an Oklahoma state prison inmate in connection with prison fights that led to a statewide lockdown of the facilities.

Court documents show former Lawton Correctional Facility inmate Justin Hill was charged Monday with conspiracy, participating in a riot, assault and battery and taking part in gang-related crime.

The documents do not list an attorney for Hill. State Department of Correction spokesman Matt Elliott said Hill was serving a five-year sentence for grand larceny and transferred to another prison days after the fights.

Prison of...