A man was arrested on Friday after investigators alleged he stabbed his 74-year-old roommate to death. Louis Gargiso, 38, of Jackson, is charged with murder and weapons offenses related to the knife used in the killing, the Ocean County Prosecutor’s Office said. Police responded to a report of an unconscious man at a home on Maple Street in Jackson on Friday at 5:55 a.m. The victim, Robert Sunris, was pronounced dead on the scene, authorities said. His body had an apparent stab wound and a knife was found nearby, officials said. Gargiso, who lived with the victim at the Maple Street home, was …