Thanks, Steve, for Piper's "lineup" reference.
Piper, however, was talking about the POLICE conducting that "lineup", not Roy Truly or Bill Shelley of the TSBD staff.
I agree. That's not a roll call. The police would have been gathering witness names and addresses (something they were supposed to have done in the Texas Theater too) not seeing who was missing.
If there really had been a roll call, wouldn't Truly have remembered it too? And if there had really been a roll call they would have known that Oswald was
not the only one missing.