police say 44-year-old hank vallentini shot himself and died. police say it began when he shot his ex-girlfriend in the head during a domestic fight. friends of vallentini said the relationship was volatile. >> pushed buttons that made him go over the edge. i think he reacted before he thought about his actions then afterwards when it sank in he thought his life was over. he wanted to spend as much time as he could with his son before the inevitable. >> the woman and son in the home were not hurt much the former girlfriend that was shot is in grave condition at a hospital. >>> emotional testimony today in one of the most horrific murder cases in dc history. both grandmothers of four girls allegedly killed by their mother took the witness stand. audrey barnes joining us live with more of the testimony. audry. >> reporter: lesli, both of those grandmothers told a similar story. they never saw or heard bonita jacks hurt her girls. both grandmothers say jacks never asked for help. all four of their granddaughters were dead. prosecutors called jacks'