The Brief Volusia County lifeguards Dempsey Manhart and Mackenzie Malone successfully revived a 5-year-old boy after he was pulled unconscious from the ocean at Silver Beach. The training of two Florida lifeguards kicked in instantly as they moved on instinct to save a young boy's life. Two Silver Beach lifeguards jumped into action to save a boy, 5, who nearly drowned in the ocean on July 30. The boy was in the arms of a family member, unconscious, Dempsey recalled. Lifeguards Dempsey Manhart (L) and Mackenzie Malone (R).