(Waupun) A Waupun Correctional Institutional inmate was sentenced Friday to an additional ten years in prison for assaulting a prison guard. Kevin Russell pled no contest to felony counts of Battery by Prison for the altercation in April of 2017 along with one count of felony Expelling Bodily Substances for an unrelated incident in July. Russell head-butted a corrections officers in the groin while he was being detained in the segregation unit. After being secured by other prison guards, the 38-year-old pushed several officers down a flight of stairs, injuring one guard. No motive was listed in the criminal complaint. In addition to extra-prison time, four years of extended supervision was added on to his sentence.