Original sentence: 1) "Authorities are investigating whether a man who allegedly drove an SUV into a holiday parade in Waukesha, Wis., killing five people and injuring more than 40, was fleeing another crime scene."
1_1) "Authorities are investigating whether a man who allegedly drove an SUV into a holiday parade in Waukesha, Wis., which killed five people and injured more than 40, was fleeing another crime scene."
1_2) "Authorities are investigating whether a man who allegedly drove an SUV into a holiday parade in Waukesha, Wis. before he killed five people and injured more than 40, was fleeing another crime scene."
Question: Whether 1=1_1, or 1=1_2, or both?