A Mills man serving time at the Natrona County Detention Center, is accused of attacking an inmate.

Forty-six year old John Kosmata has been charged with one count of aggravated assault.

The Natrona County Sheriff's Office says on Friday, February 5th, deputies at the Natrona County Detention Center, found Michael Rollins lying in a pool of blood with injuries that suggested he was attacked.

According to a report, one laceration was deep enough to see his skull

He was taken to the ICU at the Wyoming Medical Center and put on a ventilator.

Witnesses say Kosmata was angry about other inmates being loud after lights out.

He was arguing with another inmate, when Rollins approached them, insulted Kosmata and then a fight ensued.

At the time, Kosmata was serving a one year jail sentence in an unrelated case, where he pleaded guilty to two misdemeanor charges of domestic battery.

Kosmata is awaiting trial on the aggravated assault charge, and could face up to 10 years in prison if convicted.