An 11-year-old student, Harper Hansman of Port St. Lucie, Florida, was killed in a shooting at her home on July 6, 2020. Harper, a pupil at Morningside Elementary who wanted to become a doctor, called 911 reporting an active shooter but later died at a hospital after being shot through the heart. Her father, 55-year-old Guy Alexander Hansman, was found shot multiple times in the garage and also died.

Authorities say the attack followed a long-running dispute with a neighbor, 82-year-old Ronald Delserro, that began when Delserro’s Bullmastiff, Roxy, attacked Harper’s mother, Monique Hansman, and the family dog. The dog had been legally declared dangerous after a hearing. On July 6 Delserro reportedly entered the Hansman home armed with two handguns; police engaged him and he was later found dead on a second-floor bedroom. The exact cause of his death was under investigation.

Anyone who knew Harper and the Hansman family or who has information about the dispute with Delserro is asked to come forward.