Prediction: if they ever find the Shooter it will be under the Next Democratic president.
Trump fired most of the FBI agents that were actually trained law enforcement and good at their jobs and replaced them with reality TV star cronies so of course the Shooter slipped through their dragnet and now one has truly flown over the coocoo's nest at the FBI because the insane aslyum inmates have taken over the building.
until we get the real FBI back instead of this hallow shell of it's former glory there's basically not much chance they're ever going to find the guy.