Another person has been charged in connection to a stabbing in Casper last month.

Thirty-year-old Robert Simmons of Mills is charged with one count of aggravated assault and one count of burglary.

According to investigators, Simmons was with Zacharia Johnson in early March, when they entered the residence of Robert Masterson and stabbed him multiple times.

When interviewed by police, Simmons admitted to stabbing Masterson once.

A motive for the stabbing has not been determined, but Masterson told police that one person told him he knew why.

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Two days after the stabbing, Simmons crashed his car into the North Platte River in Mills.

While checking Simmons for injuries, police confiscated a knife.

Detectives were later informed by fire personnel at the hospital, that Simmons told them something to the effect that he was trying to “atone for his sins for stabbing a guy the other night,” and that was the reason he drove his car into the river.

Simmons is being held on $75,000 bond awaiting trial, and could face 10-to-50 years in prison on the aggravated assault charge if convicted.

Johnson is also facing similar charges in connection to the stabbing.