A Casper man has admitted that he choked his girlfriend in an argument.

Roger Johnson has pleaded guilty to one charge of strangulation of a household member.

Investigators with the Casper Police Department say in late September/early October 2016, the victim went to bingo with her grandmother.

Johnson followed her to her grandmother’s residence and afterwards he forced her into his car.

They began driving to Wheatland and Johnson alternated screaming and crying, saying she was cheating on him and he loved her.

He also threatened her with a large flashlight and a folding knife.

Johnson and the victim returned to their apartment in Casper, where he grabbed a knife and held it to her throat.

He choked her and grabbed her genitals, then took her to her grandmother’s house.

The victim later contacted police and Johnson was eventually found.

As part of plea deal, prosecutors dropped charges of aggravated assault, kidnapping and third degree sexual assault.

There is no agreed upon prison time, which means Johnson could get the maximum of five years in prison, when he is sentenced at a later date.

He is being held on $50,000 bond, and already has a previous conviction for aggravated assault.