Eddie Piper gave the following account about some sort of, what he called, "lineup":
From his WC testimony:
Mr. BALL. Did you at anytime after the shooting miss Lee Oswald---did you notice he wasn't around?
Mr. PIPER. No, sir; I didn't notice it until the lineup. You know, I just figured all the people was there.
Mr. BALL. You did notice it at the lineup, did you?
Mr. PIPER. Yes.
Mr. BALL. Tell us about that.
Mr. PIPER. I did notice it in the lineup.
Mr. BALL. What do you mean by the lineup?
Mr. PIPER. I mean, when they lined us all up and told us to give our name and address and just to go home.
Mr. BALL. You say "they"; who do you mean?
Mr. PIPER. The detective---whoever it was.
Mr. BALL. The police?
Mr. PIPER. Yes; they had the building all surrounded. They went to locking the doors back and front and told us to all come up and then go home, and I told him, I says, "I've got to go down in the basement and get my clothes," and he said, "You can go down and get your clothes and come on back up here, but give me your identification and your name and tell us where you are staying," and everybody heard me say that, I guess, and he let us out of the building, one by one, and I went on out the front door.
He doesn't explain who the "all" were. The manual workers? All workers?
Bugliosi's account has DPD detectives getting a list of names and addresses of the employees in the building from the personnel department. Apparently they, the detectives, then went and interviewed each employee in the building and checked them against their list. If Piper's account is true they had some sort of list they used.
Whether one wants to call that a "roll call" or not is another question.