D3k... Again!

[bbsbvb83]

I'm sure this has been discussed ad nauseam in previous threads, but most of those discuss ASA. NFHS rules only, please:

First batter of the game. Uncaught third strike. BR turns around and takes five steps towards her team's third base dugout. All defensive and offensive players and coaches are oblivious to the situation. At this point, should she be declared out for abandonment, or should the home plate umpire wait until she enters the dugout?