Sentencing is scheduled September 30 for a Columbus man who pleaded guilty this week to involuntary manslaughter and aggravated robbery charges in the death of a pizza delivery driver last year. 18-year-old Sean Fletcher is one of two people charged in the death of 45-year-old James Crabtree Junior at a North Cassady Avenue home last October. The alleged gunman, 17-year-old Diondre Jefferson, is awaiting trial on adult charges.