California authorities have arrested five suspects in the Halloween shooting at an Orinda Airbnb “mansion party”, which left five people dead.A retired lumber executive is charged with the murder of his wife, who died of a horrific axe wound to the head, 37 years ago.Finally, law enforcement agencies arrested a 73-year-old retired Arizona plumber, and charged him with the 1979 sexual assault and murder of a woman in Nevada. He is suspected in multiple other homicide investigations, and is considered a possible serial killer.