An investigation is underway after a 24-year-old man died and three other people were wounded in a shooting Sunday night.

Forensic pathologist Dr. Michael Baden shared his theory on the "unusual" circumstances that may have led to the deaths of Gene Hackman, his wife Betsy Arakawa and their dog.

Four people were shot in Portsmouth and one died of their injuries, according to police. According to the Portsmouth Police Department, officers were first called to the 2900 block of Arcadia Avenue around 9:11 p.