Where evidence exists that a homicide has been committed either within or without the Commonwealth, under circumstances that make it unknown where such crime was committed, the homicide and any related offenses shall be amenable to prosecution in the courts of the county or city where the body or any part thereof of the victim may be found or, if the victim was removed from the Commonwealth for medical treatment prior to death and died outside the Commonwealth, in the courts of the county or city from which the victim was removed for medical treatment prior to death, as if the offense has been committed in such county or city. In a prosecution pursuant to subdivision A 8 of § 18.2-31, the offense may be prosecuted in any jurisdiction in the Commonwealth in which any one of the killings may be prosecuted.