“When he heard other agents talking about shots, did he say, “We fired them and tossed the shell casings into a ditch”? Why not?”
Probably not since Ramos did not toss shell casings anywhere. He did not even pick any up. Also, he did not know at the time that Compean did, or was going to pick up the shell casings.
So Ramos said, "We shot at this guy over there"? Why not?