A Pennsylvania man killed 3 people, including his 13-year old sister, police say. Here's what we know

Police are investigating after a 26-year-old man allegedly killed three people, including his 13-year-old sister, at two homes in Pennsylvania before carjacking a driver and fleeing to New Jersey. The suspect carried out the attacks using an assault rifle. He was eventually arrested and taken into custody without incident. The crime spree prompted temporary shelter-in-place orders for residents in Falls Township. The suspect had driven a stolen vehicle from Trenton and shot his stepmother and sister at their home. He then broke into another home and fatally shot a woman with whom he had children.