Breath and Blood Tests in California DUI Cases

Breath and blood evidence can become an important part of a DUI case, but the meaning of a result depends on how the sample was collected, recorded, and connected to the rest of the evidence.

Bring every testing-related document you have to a consultation. A lawyer may want to understand the type of test, timing, whether additional testing occurred, and what warnings or instructions were given.

Because testing rules and consequences can be fact-specific, this site does not attempt to tell readers whether a particular result is valid or invalid. That requires individualized review.

Questions worth bringing to a consultation

• Which deadline or hearing date needs attention first?
• Which documents or evidence should I preserve?
• What parts of the case are included in the quoted fee?
• Who will handle court and license-related communication?
• What should I avoid doing while the case is pending?