The storm drain "catch basin" was the location of the head shot sniper with the last chance for the "kill shot" according to "Everything Is A Rich Man's Trick" author and the film narrator, Francis Richard Conolly.
The Never-Ending Parlour Game of "Whodunit" which is exactly what the CIA wanted. Assassination reseachers and other American's obsessed with finding the truth behind the "Crime of the Century" were themselves victim of the "conspiracy theorists" psyop as set out in the infamous 1967 memo. A plethora of limited hangouts and false trails and clues over the decades would cause these concerned citizens to "spin their wheels" into obsession while protecting Poppy and his band of traitors as they steadily rose to complete and absolute power.
The rest of this memo, including its many referenced attachments have been scrubbed from the interwebs.
That blonde kunt with the evil eyes posing for the camera while giving the screaming child a hot shot.
Find her, anons.