and to make it even more difficult, the eyewitness, walter ferguson, had seen something different. describe the thuk that you saw speeding off. >> as he passed me i could see it was like a white truck and i saw the four by four on it, but that was about as much i could see on it. >>o the witness had seen a white truck, and jessie said she saw a reddish brown car. investigators had a lot to sort out. a murdered soldier, a distraught wife, an unknown motive and a giant secret about to be discovered. jessie reveals a bombshell about her husband that could blow the case wide open. coming up -- >> he had told me he bought a large quantity -- and he said we are now bad people. >> if this story checks out, that's pretty serious. >> if we could prove it, yes. >> when dateline continues. cous >> when dateline continues ex ule and grab every moment. made with superior softness, for your comfort. kleenex. the softest ultra tissue. ♪ ♪ no matter how you stay fit keep it light with light & fit's rainbow of delightful, protein-packed flavors. ♪ ♪ i think the house is changing him... -[ gasps ] -