Wardens say it happened after his nephew shot him while the two were out hunting on Thanksgiving day.
According to authorities, 40-year-old Craig Mitchell was shot in the thigh by his nephew, 19-year-old Brian Mitchell.
Craig made it out of the woods under his own power, and was taken to Franklin Memorial hospital before being transferred to Central Maine Medical Center.
The younger Mitchell told authorities he thought he was shooting at a deer.
The incident remains under investigation.