Wife Susan St. John says Rheault died of natural causes Oct. 16 at his Owls Head, Maine, home.
The Boston-born Rheault served 26 years in the Army.
While commander of the Green Berets in 1969, he and seven of his men were arrested by the U.S. military, accused of killing a Vietnamese double agent. After the charges were dropped, a photo of Rheault appeared on the cover of "Life" magazine.
Rheault retired from the military that year and later came to Maine. He founded and ran the Outward Bound Program for Vietnam Vets suffering from post-traumatic stress syndrome.
More Nation & World Headlines
Nuclear smugglers sought terrorist buyers 6:26 p.m. Two win Nobel Prize for missing piece in neutrino mass puzzle U.S. strike on hospital was mistake, top general in Afghanistan says US to release 6,000 prisoners as part of sentencing-reform campaign Ex-UN General Assembly head among 6 held in bribery scheme American heating bills set to be lowest in at least four winters Clinton ad seizes on Rep. McCarthy’s Benghazi comments After weeks of unrest, Palestinian leader appeals for calm
Our new comment system is not supported in IE 7. Please upgrade your browser here.