Start at time stamp 4:45. That's the most perfect summary of the "investigation" that exists.
https://www.youtube.com/watch?v=i_XHcZR7zf0&list=PLZDGyeSTtYZp3lNa3DOYS0x8gpwMoU-tJ&index=2&t=0s
https://www.youtube.com/watch?v=i_XHcZR7zf0&list=PLZDGyeSTtYZp3lNa3DOYS0x8gpwMoU-tJ&index=2&t=0s