I didn't say I had proof, but there's no reason to think it was taken before or during (your fabricated "rifle" sighting, and your "shadow readings" notwithstanding). What would Powell's interest in the TSBD be at that time?
I believe I've told you..... Powell took the photo just minutes before the murder....His job was to take a photo of the face of the TSBD a couple of minutes before the motorcade passed by. The photo was intended to be "photographic proof" that Lee Oswald had fired AT AT JFK...... The photo shows something that could be a gun barrel sticking out of the SE corner window....
Powell didn't have a clue WHY he was ordered to take a photo of the building at the time that the ambulance was picking up the epileptic seizure victim....but he did take the picture.
Powell was as gullible as LHO....and did as he was ordered and kept his mouth shut.
If Tom Dillard hadn't spoiled the plot by inadvertently taking a photo DURING the shooting which showed that there was NOBODY behind that window at the time of the shooting the conspirators would have published the Powell photo with the caption....
"Witness photographically captures Lee Harrrrrvey Ossssswald in the act of assassinating President Kennedy."Tom Dillard wrecked the plot......Hoover's henchmen were forced to hid the Powell photo, and juggle the chronology of Dillard's photo.