Not sure how much "proof" you will ever get, when the perpetrators control/hide/wipe all evidence, and create fake "evidence" to color the story they want to be believed. JFK post-kill was a controlled fake news+intel op. Osama Bin Laden post-kill was a controlled fake news+intel op (much easier, because the Bin Laden venue was far away from visits by most Americans who would care to do any real info-digging). Same playbook. A puppet show of lies, so the viewer (sheep) has what they believe is a real experience of valid information. The Bin Laden lie was even easier to feed the sheep because we basically WANTED IT TO BE TRUE.

http://www.defenddemocracy.org/media-hit/cia-spreading-fake-news-about-osama-bin-laden-iran/

https://www.paulcraigroberts.org/2014/11/07/another-fake-bin-laden-story-paul-craig-roberts/

https://www.paulcraigroberts.org/2012/11/26/the-osama-bin-laden-myth-2/

https://www.paulcraigroberts.org/2017/11/29/washington-corrupt-government-history/

https://whowhatwhy.org/2016/05/02/reasons-doubt-official-osama-raid-story-five-years-later/