Your daughter has a right to know the result of the breath test and will be advised ofit at some point (at her arraignment if not before).
The officers should have been willing to tell her the result right away, but the fact that they did not has no legal effect on her case. They were under no obligation to give you the test result.
If the case ends up going to trial
, you will be able to testify to what you saw when she took the sobriety test. If the officer testifies to something that did not happen, your testimony can contradict and impeach his, which of course would be to your daughter's advantage if the jury believes you rather than the officer.
Why was your daughter at the hospital? That is unusual for a routine DUI arrest. Did she tell the officers that she had taken a prescription med before drinking? If so, she could be charged with driving under the combined influence of alcohol and a drug even if her breath test was below the legal limit.
Your daughter should consult with a local criminal
defense attorney, who will be able to give her specific advice about how to handle this situation. If you do not otherwise know an attorney, you can find one through the local bar association's lawyer referral service.