Very interesting times to be sure.
Some of the mob people shot could have been shot by other members of the mob.
forensics at that time were pretty primitive. Certainly Smith should not have been armed if in jail. I read, some years ago an account that had Hyrum outside the jail, trying to escape, with Joseph following. Can’t find it now, and that is contradicted by many (Mormon)sites.
Also lost to history is who fired first. It was asserted that Hyrum was shot in the face as someone attempted to open the door by shooting the lock, but that is a very unlikely method of opening a lock, and penetration through the lock would be unlikely.
In addition to not being very good at fraud, or banking, I would suggest that Joseph was not very good with a pistol.
Uh...
...considering how many offspring he left behind; the facts would tend to indicate his other; uh; pistol, shot a LOT of blanks as well.