I’m trying to remember a movie where the main character has a flashback scene when she is a kid in the store with her mom. There is an old man who owns the store and a young man is the cashier. The mom and daughter leave and while they are getting into the car, the cashier guy comes out of the store holding a gun, then the old man comes out and has been shot in the arm. The cashier then shoots the mom in the head while the little girl is in the car crying. That’s the end of the flashback. The mom and daughter are both blonde if that helps.