Mo. Rev. Stat. § 541.090: Party wounded in this state and dying in another.

If any such wound or mortal injury shall be inflicted on any human being in this state, who shall die thereof in another state, an indictment may be found, and a trial and conviction thereon had, in the county in which the wound or mortal injury was given or inflicted, in all respects as if the death happened in such county.