We ran a very similar story a few weeks ago. But he doesn't seem to have stopped.
Masquerading as one "Greg Garwood", Josh Hoopes is continuing to approach dealers trying to sell sketches (below) purporting to be by Todd McFarlane. Bleeding Cool has received confirmation from Todd, if confirmation were needed, that these are fakes.
He has already scammed one respected dealer and is continuing to do so. He really is a shit.