I think that after seeing that BTL, Sam is going into FULL denial mode, trying to distance himself from those two horrible men he saw in it as MUCH as he can. His mind, disgusted with the ferocity of this particular truth has decided to run from it, and ignore evidence that supports it. He no longer believes that he and Chino, Doc, or Ohanzee had any contact before this particular job. Why so MUCH contact and for so LONG? Well, this is a helluva big job, stealing something older than recorded history and all. I wouldnt be surprised if this jack was months to years in the making. Yup, Sam was FOR SURE just some hired help for this job who got caught up with the wrong guys. YUP!