Jeffrey Simon Hubbard has pleaded not guilty to all charges, including homicide by vessel in the first degree, relating to the death of Usher's 11-year-old stepson.
Earlier this month, Hubbard was charged in the death of Kile Glover for his role in a July 6 boating accident on Lake Lanier.
Gainesvilletimes.com reports that Hubbard also pleaded not guilty to charges of reckless operation of a vessel, unlawful operation of a personal watercraft, boat traffic violation and serious injury by vessel.
If convicted of homicide by vessel, Hubbard faces a minimum of three years in prison, not exceeding 15.
Law enforcement official say that Hubbard was in violation of the 100-foot law, which mandates drivers of boats and personal watercraft not operate at more than idle speed within 100 feet of a sitting object or a person in the water.