DOVER, N.H. — A former New Hampshire school bus driver already indicted on federal charges involving the sexual exploitation of children has been indicted by the state on 15 new charges alleging he sexually abused a local child and filmed the incidents on a school bus.

When he was arrested in September, 45-year-old John Allen Wright of Milton was a driver for special needs children in Kittery, Maine, Rochester and other areas.

Past charges allege Wright had pornographic images of child sexual abuse on his computer and that he assaulted a boy in Maine. The new charges allege he engaged in sexual acts with a boy, now 5, between 2009 and 2011, filming the incidents on his bus.

Wright’s lawyer did not return calls seeking comment Tuesday.