CHICAGO (AP) — A former Chicago-area sheriff’s deputy pleaded guilty in federal court Wednesday to a misdemeanor civil rights violation for yanking on an inmate’s ankle shackles, flipping him forward onto a concrete floor and breaking his nose.

Rafael Munoz, 39, of Chicago, entered the guilty plea to the charge of using unreasonable force at his arraignment in U.S. District Court in Chicago. At his Dec. 10 sentencing, he faces a sentence of up to a year in prison.