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A celeb nutritionist who once appeared on “The Dr. Oz Show” and “The View” to hawk a weight loss product shot and killed his ex-wife and her husband … according to the 911 call.
Robert Lindsey Duncan can be heard on the call — obtained by TMZ — telling the dispatcher 2 people tried to shoot him and his wife as they pulled into their driveway in Yellow Springs, Ohio … but he shot them instead.
Duncan says … “I shot them. They came up to our window and had a gun pointed at my wife’s head. The other one got out of the car, went over to the car — they…