An insurance company is asking a federal judge to force a man from Vermont to discuss what happened to a missing gun that matches the caliber used to kill his grandfather, a Connecticut resident.

According to the Hartford Courant, National Liability & Fire Insurance company lawyers filed a motion in Rhode Island last week seeking to compel Nathan Carman to discuss the Sig Sauer rifle he bought before his grandfather's death.

Carman is accused in a lawsuit of being responsible for the 2013 death of real estate developer John Chakalos.

The insurance company is seeking to avoid payment on a policy for a boat Carman was on when he and his mother disappeared in 2016.

His mother is presumed dead. He was rescued.

He denies any wrongdoing and has not been charged with either death.