Well...#1...how many other armed prisoners firing off weapons in other settings have been deemed as "martyrs?"
Beyond that...see my conjecture in post #17.
Because it also comes down to how much a given guard may have known that Smith & Co. were armed with two loaded weapons...loaded weapons that Mormon historians conceded were in possession of Smith (with one being fired off)...just a concession you NEVER see Lds top leadership emphasize -- or even mention -- in their tours of the Carthage jail they own...or in their writing/speaking of Smith's death.
This is info deemed as not "faith promoting."