A 39-year-old mother of three with ties to New Jersey died last weekend after she was shot in a parking lot in Jacksonville, Florida, authorities said. Diana Sarah Kellam, who lived in Bergen County before moving south several years ago, was the victim of a fatal shooting near a gas station on Baymeadows Road in Jacksonville, according to her family and law enforcement. Officers were called at 6:48 p.m. Sunday to the Gate Gas Station, where they found a woman on the ground, covered in blood, according to an incident report from the Jacksonville Sheriff’s Office. She was pronounced dead shortly…