considering how childish the drawings are, I think they are what he saw and not what he did. Jack didn't call Sonya as his brother was dying because he wanted to make sure no information would get out. The next turning point will be when we find out what Hank knows. Sonya will have to notice the drawing is missing…

“David took that son of a bitch Goliath down with a small stone,” the roadside proprietor tells Linder ….who happened to be John Cale, the great musician who was in the Velvet Underground with Lou Reed. The second musician cameo after Lyle Lovett in the first episode.