Father-of-two shot daughters to death before turning gun on himself, police said David Kaser, 56, fatally shot Clarissa Kaser, 19, and Crystal 'Grey' Kaser, 14 Investigators said David was on phone with his wife when he murdered his kids Teresa Kaser asked Sand Springs, Oklahoma, police to do welfare check at home Police said they know the motive but 'won't be sharing it with the public' When investigators arrived on scene, they knocked on door and got no response Investigators found dead bodies of David and his two young daughters Incident took place less than two weeks after triple murder-suicide in same town