Two men were indicted by the O'ahu grand jury this morning on manslaughter charges in connection with a high-speed auto race in Mililani last year that ended in a crash, killing one teenager and seriously injuring another.

The defendants, Justin Amorin and Bernard G.K. DeCoito Jr., were also charged with second-degree assault.

Amorin was driving a red Volkswagen Jetta that raced down Lanikuhana Avenue with another vehicle driven by DeCoito, who's also known as Kawehi Tomisato, according to court records.

They were "driving 80 to 100 miles per hour in a residential area," deputy prosecutor Nora Garrod said in court.

Amorin's car crashed into a tree, killing Gillian Badua, 17, a passenger in the backseat of the car. Gavin Watson, now 19, a passenger in the front seat, suffered serious head injuries.