Swamp People Star Dies
According to WBRZ.com, Mitchell was discovered at 9 AM in St. Martin Parish, Louisiana.
Law enforcement sources tell us ... someone tried to perform CPR on Guist ... but attempts to resuscitate the reality star were unsuccessful.
Sources close to Mitchell tell us ... Guist had recently fallen ill ... but the nature of his illness is still unclear.
Update: Law enforcement sources tell us ... Mitchell was out in his boat along the Belle River ... when he "fell." Witnesses say he appeared to have been suffering from a seizure.
We're told another person on the boat returned the vessel to the dock and called 911. Emergency personnel responded to the scene and transported Mitchell to a nearby hospital ... but it was too late. more on this story
TMZ submitted this story.