I do not agree that antifa was involved in most of the instances of violence. Since most of the people who perpetrated violence or destruction have been arrested, and will be prosecuted, there is an opportunity to find out if they had connections with antifa. As for an investigation, my understanding is that an exhaustive investigation has already begun, and is expected to go on for a long time. How David Bailey came to shoot Ashli Babbit will surely be an important part of that investigation. Just try not to say it's not an investigation if the Democrats run it. They happen to be the party in power in both chambers, and whatever party that is usually controls investigations. If you want democracy, you have to accept that either party may be in power at any given time.