BURLINGTON (AP) - The family of a Thetford man who died after being shocked with a stun gun fired by a Vermont State Police trooper is going to file a lawsuit against the state police.

An attorney says the mother of Macadam Mason is planning to file a civil rights action Wednesday in U.S. District Court in Burlington.

Mason's death in June 2012 prompted the Vermont Legislature to pass a new law requiring the creation of a stun gun policy for police departments. It also says officers may only use a stun gun against people who are exhibiting aggression or who are actively resisting in ways that are likely to harm themselves or others.

An autopsy determined Mason died of heart failure after being shocked in the chest.