A Muscatine teenager involved in a fatal drunk driving accident in March is pleading guilty.Eighteen-year-old Trisha Schubert of Muscatine was charged with homicide by vehicle and serious injury by vehicle. Police say Schubert was drunk when she drove an S-U-V into a utility pole, killing 11-year-old Jessica Ballheimer of East Moline, Illinois. Schubert could get a 25-year prison sentence.