The CIA has long history of associating empty shoes at their shootings. First, for some unknown reason, the TV news feature tons of shoes lying around on the ground after shootings to create a trauma based emotional response with viewers. I guess people just get separated from their shoes when they are shot.
Then the shoes are brought out again at a later time, so the brainwash victims can re-live the trauma of the shooting. The shoes represent seeing dead kids, I guess.
Go figure.
https://www.vox.com/policy-and-politics/2018/3/13/17116230/shoes-outside-capitol-gun-violence
https://www.teenvogue.com/story/shoes-memorialize-school-shooting-victims-sandy-hook-capitol#:~:text=On%20Tuesday%2C%20March%2013%2C%207%2C000%20pairs%20of%20shoes,20%20children%20and%20six%20staff%20members%20were%20killed.