1) bases loaded - one out - full count
2) next pitch - home plate umpire calls ball four on a check swing
3) batter takes first and all base runners advance scoring one run
4) catcher asks the home plate umpire to appeal the check swing with field umpire
5) field umpire says the batter swung - strike three (two outs)
Question: is this a live ball (runner scores) or a dead ball (all runners return to the base at the time of the pitch)?
NFHS rules imply this is a live ball but it is not specified very well.