"Legal experts said DNA evidence will likely be key: DNA was found beneath JonBenet's fingernails and inside her underwear and authorities have never said whether it matches anyone in an FBI database. U.S. and Thai officials did not directly answer a question at a news conference about whether there was DNA evidence connecting Karr to the crime.

"Karr was given a mouth-swab DNA test in Bangkok, according to a law enforcement official who spoke on condition of anonymity because of the ongoing investigation. The results of that test were not immediately known. Karr will be given another DNA test when he returns to the United States in the next several days, the official said. "
Doubts

If not him, I hope they find and convict the killer, the torturer, the perverted mind that was able to conceive and perpetrate this heinous thing.