No. Even if the accident meets the FMCSA definition of an accident requiring testing, it is too late. The regulations state that drivers who have been in an accident requiring Post-Accident testing must be tested for controlled substance and alcohol use as soon as practicable following an incident. If an alcohol test is not administered within 8 hours following the accident, the employer shall cease all attempts to administer a test. Similarly, a substance abuse test must be administered within 32 hours of an accident. You should document all of this.