Michael Bryce Underwood will be in a Montague County courtroom Monday for a plea hearing.
Investigators said Underwood told emergency responders that he and Maki were hunting and he was outside the vehicle taking aim on an animal and discharged his weapon accidentally shooting Maki.
The Montague County sheriff had said that the shooting appeared to be a tragic accident, saying Underwood was emotional and visibly upset when deputies arrived.
Underwood was arrested at the scene for consumption of alcohol by a minor. He posted bond and was released.
The Montague County District Attorney Paige Williams said her office has a policy that all unnatural deaths go before a grand jury.