In terms of appeal to authority, how does Freeman's citing the POTUS and senior Senator Richard Russell rank?
What I referred to was an appeal to the proven expertise of people with a long-term background in their fields.
Freeman merely stated the known fact that Russell and President Johnson both did not believe the SBT. If Freeman's intention was to prove the single bullet theory wrong, than that would equally be an appeal to authority, but I don't see him doing that.
You on the other hand used your appeal to authority as proof that the official narrative is correct, which is the essence of the fallacy. It is also dishonest because subsequent investigations, after the initial one by the FBI and Warren Commission, used the same evidentiary material, which basically was only the prosecutorial case against Oswald. There is not a single item of exculpatory evidence in the WC report or the 26 volumes.
As John Banks correctly said;
If the source material is garbage, all investigations that followed reached conclusions that were based on a garbage foundation. The conclusions of the Warren Commission are not proof that the conclusions of the Warren Commission are correct!