Mr. Ball. Who is M. G. Hall?
Mr. Potts. He is a detective in our bureau.
Mr. Ball. And who is Charlie Brown?
Mr. Potts. Charlie Brown is also an officer assigned to the bureau. Now, I might be wrong about that, but it seems to me like they were the two that showed up then, but they might not have been.
Mr. Ball. Now, did you have anything to do with the selection of the men who were to be in the showup?
Mr. Potts. No, sir; all I did was just to go down to the jail door and walk with the showup out to the stage, and I stood out on the stage while the showup was conducted.
Mr. Ball. How was it conducted? Describe it.
Mr. Potts. Well, there is an anteroom before you get to the showup stage. Now, the witnesses were out front behind this transparent black nylon screen. There's a light set at an angle on the stage where the person on the stage can't see the people out in the audience. They brought them out handcuffed together and this John Thurman Horne went in first—no, that's wrong—Lujan went on first, because he would be No. 4. You see, they're got numbers above the—above them higher up there.
Mr. Ball. What is his full name?
Mr. Potts. Daniel Lujan, and then Oswald was No. 3, Knapp No. 2.