As reported in the Guardian (via The Book Trib):
... a 51-year-old man has been arrested in England for stealing a rare first folio edition of Shakespeare’s plays, printed in 1623. The “priceless” book (only 200-300 survive) disappeared from Durham University over a decade ago in December 1998. It resurfaced when the suspect, “claiming to be an international businessman who had acquired the volume in Cuba... showed the folio to staff at a library in Washington, DC and asked them to verify it was genuine.”
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Things have moved on a bit since this story appeared in the Guardian in July 2008. The man arrested has, as far as I know, not been charged. He denies it is the Durham copy, and in late October started a legal challenge aimed at the return of what he refers to as the Cuban copy of the first folio. Further details here:
http://www.thenorthernecho.co.uk/news/3793329.Arrested_book_dealer_launches_legal_challenge/