Coroner: Reality TV Star Died of Natural Causes Authorities in Louisiana say a man who starred in the reality television show "Swamp People" died from natural causes. Ascension Parish Sheriff Jeff Wiley says the parish coroner, Dr. John Fraiche, made that determination after a preliminary autopsy on Mitchell Guist. In this undated image released by History, Mitchell Guist from the series "Swamp People," is shown. Guist, who appeared in segments of the "Swamp People" with his brother, Glenn, died after collapsing Monday, May 14, 2012 while working on a houseboat he was building on Belle River. (AP Photo/History, Zach Dilgard) Close Guist, who appeared in segments of the "Swamp People" with his brother, Glenn, died after collapsing Monday while working on a houseboat he was building on Belle River. Authorities tell The Advocate of Baton Rouge, La., (http://bit.ly/JRj1fD) Guist had just launched the houseboat and was pushing it when he collapsed. Funeral services are scheduled for Saturday in Gonzales. "Swamp People," which airs on the History channel, features residents of Louisiana's Atchafalaya swamp country during alligator hunting season.