Blown 10 second count

[SperlingPE]

This happened in a boys varsity regular season game high school
19 seconds left in the game (4th quarter)
score is tied
team A inbounds ball after made basket (to tie the game)
team B pressures team A as they bring the ball up the floor
Trail official calls 10 second back court violation
Clock reads 12 seconds
Coach of team B points out the discrepancy to the officials
Officials agree that the ball was inbounded with 19 seconds on the clock and that the clock was started properly

What do you do as a crew?
I will post the crew's decision and I will post the state high school association's recommnedation (after the fact)