Is there a maximum window a blood toxicology sample may be obtained after a crash?

The longer between driving and blood draw, the harder it is to associate the result to the time of driving. This is especially true after a crash where medical attention is given due to the body?s response to trauma and drugs given during medical procedures. The biggest caveat is that different drugs will react differently to these inputs. There is case law that suggests 6 hours is admissible, not sure the drug. Even if admissible, then question is the value of the evidence. It might be very low. This should not cause you an immediate DMV suspension either way. A quality DUI attorney can provide more specific analysis with more information.