PANAMA CITY, Fla. (AP) — A former Florida prison guard has been found guilty of assaulting and inmate and then planting evidence in a failed attempt to claim self-defense.

Willie Walker is facing up to 10 years in prison after being convicted Friday in federal court of violating the inmate's rights.

The Panama City News-Herald reports that in March 2015 the 58-year-old Walker sprayed a Gulf Correctional Institution inmate with a chemical agent and then struck him repeatedly, fracturing his nose and causing a head wound that required stapling. Officials say he then planted a homemade knife.

Walker is scheduled to be sentenced in December.

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Information from: The (Panama City, Fla.) News Herald, http://www.newsherald.com