Tim Rutledge was pinned underneath his rig after he tried to clear ice off the brakes.
Infants and elderly most at risk.
55-year-old John Freskos of Clayton was found about 6:30 a.m. Saturday in a grassy area, about a mile from his home.
The three victims were last seen alive Saturday afternoon, hiking along the Ozark Trail. By the next day, they were dead.