I just ran across this; notable because it includes the iconic Mouse/Kelley skeleton and roses painting.
Story
here.
From the story:
What started as a festive auction of Grateful Dead memorabilia has resulted in a police investigation after about $75,000 worth of items were reported stolen from an auction house in McHenry County.
The stolen items include a 1966 original silkscreen of a skeleton with roses, which was enhanced by artist Stanley Mouse for the auction and had a reserve price of $25,000. The other items are a 1986 German promoter poster; a 1986 Statue of Liberty tour poster; and a 1966 serigraph signed by artist Wes Wilson.
An image of the Mouse/Kelly piece is
here.