For full toxicological analysis, it is recommended that the submitting agency provide the following:
Driving While Intoxicated Cases
- Blood is the preferred sample for DWI cases. Please submit two full vials of blood. Blood should be collected in 10 mL glass gray-topped vials containing 100 mg sodium fluoride and 20 mg potassium oxalate.
- Urine is not recommended for DWI cases. Drug-positive urine results only indicate exposure to drugs and cannot be related to drug impairment.
Drug-Facilitated Sexual Assault Cases
- Blood AND urine should be submitted for drug-facilitated sexual assault cases. Please submit two full vials of blood and at least 50 mL of urine. Blood should be collected in 10 mL glass gray-topped vials containing 100 mg sodium fluoride and 20 mg potassium oxalate. Urine may be collected in a specimen bottle or cup.
Failure to submit the recommended volume of blood or urine may result in incomplete testing.
Each specimen vial, bottle, or cup should be labeled with the following:
- Name of the individual from whom the specimen was collected
- Date and time of collection
Specimen vials, bottles, or cups should be stored inside a leak-proof container, such as a plastic bag. The samples then may be placed inside a paper specimen container, such as a cardboard box, or envelope, if desired. It is acceptable to include multiple specimen vials, bottles, or cups in one specimen container if they all pertain to the same case. The specimen container should be sealed with evidence tape and must be labeled with the following:
- Initials of the individual submitting the specimen container - initials must be written across both the tape and the container
- Name of the submitting law enforcement agency
- Case number
To maintain the integrity of the specimen, a chain of custody should be initiated upon collection and the specimen should be refrigerated as soon as possible.
Result Reporting for DWI Testing
In suspected Driving While Intoxicated (DWI) cases, blood specimens first undergo alcohol testing. If the blood alcohol level is greater than or equal to 0.100 g/100 mL, no further testing is performed unless specifically requested. If the blood alcohol level is less than 0.100 g/100 mL, drug testing is performed.