As usual it would seem that this would be more evident in the news stories, rather than half way down and mentioned as an afterthought.
From Yahoo News:
No evidence against Karr has been made public beyond his own admission. U.S. and Thai officials did not directly answer a question at the news conference Thursday about whether there was DNA evidence connecting him to the crime.
Karr's ex-wife, Lara Karr, told KGO-TV in California that she was with her former husband in Alabama at the time of JonBenet's killing and she does not believe her former husband was involved in the homicide.
She said her ex-husband spent a lot of time studying the cases of Ramsey and Polly Klaas, who was abducted from her Petaluma, Calif., home and slain in 1993.