There is more detail on the charges in an webbed article from the Maine Antiques Digest at:
http://www.maineantiquedigest.com/articles/
dunc0799.htm
'On May 18 a federal grand jury in New York City handed up a five-count indictment charging that Alastair Duncan was actively involved in at least two schemes to deal in stained-glass windows by Louis Comfort Tiffany that Duncan knew had been stolen. Duncan, 57, who lives in Manhattan, is a prolific author, dealer, and consultant specializing in decorative arts of the 19th and 20th centuries.
(It should be noted that the charges contained in an indictment are merely accusations, and Duncan is presumed innocent until and unless proven guilty.) ' and
'If convicted on all five counts, [Alastair] Duncan could face up to 35 years in prison and a fine that could total $1 million, plus restitution.
Further court proceedings will begin on June 21.