 But the tragic end, again, leaves you feeling empathy for the family members and how they're still tragically affected by the loss that happened decades ago. It's unlikely that we'll ever know what happened to the Yuba County Five. A group of men with intellectual disabilities, they went missing in Plumas National Forest back in February of 1978. Four men, Bill Sterling, Jackie Hewitt, Ted Weir, and Jack Madruga, were later found dead. While a fifth, Gary Mathias, was never found.