The bad news was that he (incredibly-because he was a hack) was able to fool the so-called experts.
The good news was that he sold two of them to Nazi Field Marshall Herman Goering.
I recently saw, courtesy of Netflix, a fascinating documentary titled "The Rape of Europa", about the looting and forced sales of art by the Nazis before and during the war.
To this day the original owners or their estates are trying to reclaim what was theirs, from private collections and even from museums.
This has all been written about extensively, and will continue as long as lost or stolen masterpieces continue to turn up at auctions or private sales.
A Vermeer whose authenticity had always been in question, and had been in a private collection, came up for auction at Sotheby's in July, 2004. A public sale of a Vermeer is an extremely rare event, the first in 80 years or so.
"Young Lady Seated at The Virginal" 10x8"
It brought a mere 31 million, and was supposedly bought by a Las Vegas Casino owner.
On the other hand, and while I'm on the subject, an Andy Warhol brought 71 million at Christies in May 2007.
"Green Burning Car Crash" Andy Warhol