The family's 11-year old daughter died of injuries at a hospital in Shreveport Friday afternoon.
Both her grandparents died Thursday when a car slammed into the back of their van.
Authorities say it happened in Monroe, Louisiana. Thursday, the family had just dropped off their son. He was on his way to serve overseas. Witnesses say the crash happened so fast - it was unbelievable.
All that's left of the family's mini van is a pile of metal. They were stopped at a red light on Highway 165 when the gray
PT Cruiser slammed into the back of the van.