A Pennsylvania woman was fatally stabbed by her ex-boyfriend in front of a police officer who was responding to a call about a break-in at her home, authorities announced Monday.

Jaden Battista, 19, was running away from Trevor Weigel, 23, outside her Yardley home when he tackled her to the ground and stabbed her repeatedly in the chest and neck, Bucks County District Attorney Jen Schorn said in a press release .