Often the accident itself will cause symptoms which can be confused with intoxication. Head trauma can cause dizziness, slurred speech and unsteadiness on feet. Administering standardized field sobriety test after an accident is often unfair for that reason.
But the breath test conducted on the Draeger Alcotest 9510 must be addressed (suppressed). These breath test must be properly administered and breath tests are often unreliable and improperly administered or improperly calibrated.