A man accused of throwing his 7-month-old son off a bridge into the Connecticut River has pleaded not guilty to murder charges.

Police say 21-year-old Tony Moreno threw his son Aaden off the Arrigoni Bridge on July 5. A police affidavit states Moreno called his mother from the bridge asking her to pick up a phone with pictures of the baby and a stroller. Police say he then jumped over the railing into the river once she arrived with his brother and police officers.

Documents show Moreno and Aaden's mother were going through a custody dispute. A judge denied a permanent restraining order against him days earlier.

He appeared Thursday in Superior Court in Middletown. His public defender would not say if Moreno is planning to pursue an insanity defense.