Aaron Burr’s Notorious Treason Case

But if I remember correctly, John Brown was tried and executed for treason against the Commonwealth of Virginia, not the United States. That was actually a significant difference back then, Capt Gregory Prickett.

(And I'm hoping that others will find it bemusingly ironic that John Brown's attempted uprising led to the very first "bi-partisan" Senate committee which Democrats hoped would incriminate those rascally Republicans in fomenting violence.)

No, you didn't misstate anything, Capt Gregory Prickett, but it did seem a reasonable inference from your omission. I apologize for any perceived slight -- I appreciate those too-rare occasions when I bump into someone who has actually studied something enough to know actual facts.
Your account of Smith's demise may be a bit misleading -- the Mormon Wars were just as ugly as the (later) fighting over slavery in Bloody Kansas, and the LDS version of that bit is that Smith was shot while trying to escape a lynch mob storming the jail, having already seen his brother shot dead in the attack. To be clear, I doubt that he could have mustered any plausible defense against the charge of treason -- by even the most sympathetic accounts, he had led armed attacks against government-mustered militias in two states.

Your opinion may vary (especially if your legal background includes time on the prosecution side), but shooting those three people seems much more reasonable to me when you add the context that he shot them through the same doorway that a bunch of very unfriendly folks were shooting through trying to kill the handful of Mormon prisoners inside (and being very successful at it). Trying to escape out the window also seems very reasonable under those circumstances, even if there were more folks waiting outside for someone to shoot at.
Also, I don't believe that the official LDS renditions omit someone smuggling the in the pistol - when I was doing some quick checking, several BYU-affilliated sources even identified who smuggled in the pistol and how. Where they do still get light on details tends to be discussing the Mormon militias pillaging and torching non-Mormon properties, or indulging in more lethal retaliatory violence.