Sentencing is scheduled September 16 for the Columbus teen who pleaded guilty Wednesday to killing a pizza delivery driver in Bexley last October. 17-year-old Diondre Jefferson pleaded guilty to adult charges in the shooting death of 45-year-old James Crabtree Junior during a robbery attempt. A second suspect, 18-year-old Sean Fletcher, will be sentenced on September 30th for his role in the shooting. He pleaded guilty last month.