Let's be clear: Trump wasn't assassinated.
Also, there isn't even an attempted assassination. No court has argued this or decided on the event, period. Let's wait and hear the arguments, all the evidence. I don't care what's on TV. We can't make any assumptions until this situation has been litigated in court and decided a panel of experts.
I think you're going overboard on "judicial notice", when the justice system is designed with a built-in bias favoring the "innocent" such that the guilty often go free. It is not a reliable arbiter of the Truth.
YOu have the CSI perspective -- gather all the evidence, consider all the logical inferences, eliminate illogical or inconsistent inferences, narrow down the sieve of possibilities until you arrive at a conclusion. If there are loose ends, it becomes an opportunity for the defense attorney.
We do want a thorough investigation, and revelation of all the facts. This wasn't done with the Kennedy assassination, obvious from reading the Warren Report and considering other evidence, depositions and observations. In fact, the JFK murder took advantage of Oswald as a "patsy-opportunity" -- a "returnee" from an infiltration project involving approximately 2,000 Marines sent to Monterey Language School in preparation. But the Mastermind wasn't in the top-echelon of the CIA. He was a mid-level counter-intel and propaganda specialist deeply involved in the Bay of Pigs invasion which preceded the JFK murder, with access to all the resources that would've otherwise been deployed against Castro. CIA was not going to do an "internal investigation", because they would've had to reveal too much in sources and methods related to many other projects. They weren't going to find out for themselves. They weren't going to publish any IG report or other material for benefit of Congress. They HAD to waive it off as it was intended by the Mastermind -- a lone nut "Communist", returned from Russia, inspiring suspicion of Russian complicity, acting on his own for any number of imagined practical or diseased emotional reasons.
With this, there is at this point a pile of "possibilities" in a sieve of possibilities, each hole in the sieve with some probability attached which can later change as additional facts are added, as additional holes in the sieve are eliminated.
But for the matter of propaganda and Public Opinion in a political campaign of this sort, there are all kinds of implications which may -- or may not -- play out. Some of those implications may be intentional by various parties -- most likely core people in the Trump campaign -- people like Bannon.
I would be very wary about future developments. I would also worry deeply about Biden and Harris, given that the "injury" was done to the "Party of Revenge and Retribution".