Any particular reason you trust the FBI?
Let’s consider that for once an investigation went the way it’s supposed to occur, and logical results are the product.
Yes, it may seem too perfect for someone looking for a conspiracy, but maybe it only looks that way because we haven’t had proper investigations for decades.
It still appears there is some neophyte amateurism, but let’s take a victory, and also push for finding out the support network for the assassin and prosecute all of them because the only thing not settled yet is nailiing the accomplices.
I think if the FBI settles on just the assassin alone, then it’s time to not trust them again.