A pro-gun mum who was shot dead by police after killing her two daughters may have let her husband survive so he would live with the anguish of losing his family, police said.
Christy Sheats is also thought to have been angered by the upcoming marriage of her eldest daughter.
The 42-year-old shot dead daughters Taylor, 22, and Madison, 17, after a row inside their home in Houston, Texas.
Sheats called a family meeting on Friday to discipline Taylor, who was due to be married in a few days.
The mother pointed a gun at her husband, Jason Sheats, and then shot each daughter one time in the house, Fort Bend County Sheriff Troy Nehls said.
She then fired more shots inside as Mr Sheats and their daughters fled.