Retrograde extrapolation is the scientific process used by prosecutors and law enforcement to estimate what a person’s blood alcohol content was at a specific time based on test results obtained at a later period of time. This is used by law enforcement in DUI cases to attempt to accurately measure the BAC of a person at the time of driving rather than the time at which the test took place.
Diana Aizman, Esq.
November 30, 2016 September 6, 2018 in DUI
Ms. Aizman is the founding attorney at Aizman Law Firm, an award winning criminal defense attorney & former prosecutor for the city of Los Angeles. She regularly appears on CNN, Fox News, HLN & CBS News to provide legal insight on various legal topics. She is a proud member of the California Attorneys For Criminal Justice, California DUI Lawyers Association & the National College of DUI Defense
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My client was arrested for DUI. His blood was drawn 58 minutes after he was stopped by law enforcement. His BAC at time of blood draw was .097. His breath test 42 minutes before blood draw was .082. He is 6 feet 3 inches tall and 220lbs. Can you tell me what his BAC was at time of stop? Thank you.