Yes Abbott and other public officials will be charged with murder if somebody drowns in that river.
Even before that, I would not be shocked if an organization such as the ACLU files lawsuits over them taking that action.
They haven’t charged Jo Jo the Demented Clown or Camela the word salad flunky with murder for all of the miggies who died trying to wade across the Rio Grande to take a free whack at the Los Estados Retardo’s Piñata Grande. Abbott and Texas are trying to save these dumbasses lives by keeping them out of the Rio Grande.