Actually, DNA evidence was introduced at trial. In Robert's storage locker they found a shower curtain that contained her blood mixed with his semen. And of course there was her dress with her blood on it. And they found her blood in his home. Overwhelming evidence, right? Apparently the jury foreperson, who was an attorney, had an idea of "proof beyond a reasonable doubt" that may have stretched the definition. She slowly, over five days, persuaded the other jurors that the evidence wasn't strong enough. The vote at one point was 10-2 for conviction. But she worked her "magic." I'm sure she was doing what she thought was right, but IMHO she was way off base. The defense tried to argue that the evidence had been planted by enemies of Robert or Corrine's mother. Far-fetched to say the least. As for double jeopardy, it's true that Robert cannot be tried again for murder or kidnapping in Minnesota. However, if Corrine's body were to be found in Wisconsin, which is possible since the abduction occurred just across the river from it, he could be charged in Wisconsin for murder and kidnapping, or in federal court for at least the kidnapping. But the chances of that happening are close to zero, unfortunately. He was guilty as hell.