No one has been publicly cleared or named a suspect in this case. David Finkelhor is quoted in the article you linked. He is the director of the Crimes Against Children Research Center at the University of New Hampshire and a researcher for the National Incidence Studies of Missing, Abducted, Runaway, and Thrownaway Children. He wrote this article for Washington Post in 2013. This part stood out to me... IMO, statistics are something to consider, but looking at where the evidence leads is much more crucial. Rare does not mean impossible. Rare does not mean it never, ever happens.