A North Jersey man was arrested in the death of another North Jersey man that took place in Atlantic City. Thomas Walker of Howell was killed after an injury caused a fall at Harrah’s Hotel and Casino. An autopsy found that the cause of death was a head injury and the manner was homicide. A nine-month investigation led to the arrest of Matthew Piazza, of Manalapan, for reckless manslaughter. The state alleges that Piazza punched the victim inside of the casino causing the head injury and eventual death.