Melissa Ball was parked at gas station with son Grayden in the backseat . The two were pulled over by a deputy for speeding. Couple had history of domestic issues but motivation for killing not known .
Melissa Ball was parked at gas station with son Grayden in the backseat . Christopher Whitmore pulled up beside car , shooting his son and then wife . Couple had history of domestic issues but motivation for killing not known .