Authorities are investigating a triple homicide involving a Florida man who was the subject of an Amber Alert issued for his young daughter last weekend. Nathan Gingles, 43, was charged with three counts of first-degree murder after he was accused of kidnapping his 4-year-old daughter, Seraphine Gingles, Feb. 16.While the girl was later found safe, her mother, grandfather and a neighbor were killed. FLORIDA NEWLYWEDS GET JUSTICE AFTER FAMILY FISHING TRIP ENDED IN MURDERAuthorities responded to reports of a shooting about 6 a.m. Sunday at a Tamarac, Florida, home, where they discovered 64-year-old David Ponzer, Seraphine's grandfather, with a gunshot wound on