Kane County Nuggets

Internal education and training for the Kane County State's Attorney's Office.

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BAC of .16 Three Hours After Driving Likely Means Driver Was Way Higher When Stopped

May 17, 2024 By Samuel Partida, Jr.

People v. Carlson, 2023 IL App (2d) 210782 (March). Episode 986 (Duration 11:40)

If it can be shown that a motorist was driving during the elimination phase, a subsequent blood test will show a BAC no higher than the motorist’s BAC while driving.

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Filed Under: Breathalyzer, DUI Tagged With: Retrograde Extrapolation

Retrograde Extrapolation, Does 4 Hour Delay Cause Admissibility Problems?

April 25, 2024 By Samuel Partida, Jr.

People v. Epstein, 2022 IL 127824 (November). Episode 971 (Duration 14:32)

The BAC test result obtained 4 hours after driving is highly probative regardless of whether retrograde extrapolation may be performed to calculate defendant’s BAC while driving.

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Filed Under: Blood, Breathalyzer, Expert Tagged With: Illinois Supreme Court, Retrograde Extrapolation

Retrograde Extrapolation Evidence Is Back Stronger And Better Than Ever

December 6, 2017 By Samuel Partida, Jr.

People v. Beck, 2017 IL App (4th) 160654 (November). Episode 424 (Duration 11:51)

Defendant crosses the centerline and collides head on with another car resulting in serious brain damage to the other driver, this 54 page opinion results.

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Filed Under: Breathalyzer, Expert Tagged With: Retrograde Extrapolation

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