FLAGSTAFF, Ariz. -- An Indiana man serving time for forcing his grandsons on a grueling hike in the Grand Canyon says the evidence didn't support his convictions.
An attorney for Christopher Alan Carlson also argues in documents filed Friday with the 9th Circuit U.S. Court of Appeals that jurors improperly were instructed on an offense for which Carlson wasn't originally indicted.
Carlson has said that while he treated his three grandsons roughly, he wasn't criminally negligent and didn't endanger their lives or health.
The filing wraps up briefing in the case. The appellate court is set to hear oral arguments on July 9th.
Carlson is asking that the convictions be reversed or a new trial ordered.
He's serving a 27-month prison sentence with an expected release date in August.