Forty-five year-old Larry Murphy Jr. pleaded guilty to injury to a child.
He's sentenced to four years in prison.
An arrest affidavit states teachers at a Wichita Falls school became concerned when they saw red marks on the boy's face.
They say the child said Murphy hit him with a belt because of a bad mark he received in school.
Upon further investigation, CPS officials say they also found marks on the child's arms, neck, back, and chest.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.