Lamont Arthur Jr. Pleads Guilty to Aggravated Homicide Charge; Matthew Harker Died In Crash While Riding BicycleLamont Arthur Jr. Pleads Guilty to Aggravated Homicide Charge; Matthew Harker Died In Crash While Riding BicycleMan who hit and mortally injured a cyclist in Casper has pleaded guilty.Tom MortonTom Morton