Recent U.S. Supreme Court Decision on Warrantless Blood Draws Illustrates Need for Discussion Between Health Care Providers and Law Enforcement
Healthcare Alert | 2 min read
May 10, 2013
The U.S. Supreme Court recently affirmed a trial court’s decision to throw out blood evidence in a drunk driving investigation where the blood evidence was obtained through a warrantless, nonconsensual blood draw. Missouri v. McNeely, 599 U.S. ___ (2013). This case illustrates the need for health care professionals to engage in proactive discussions with law enforcement regarding procedures for a nonconsensual, police blood draw in order to avoid liability concerns for battery or professional misconduct.
During a routine traffic stop, a police officer arrested respondent patient for driving under the influence of alcohol. The patient refused to submit to a breathalyzer or blood test to determine his blood alcohol level. The patient was not injured, but the officer took him to a hospital, where hospital personnel performed a nonconsensual blood draw. As in most states, in Missouri (and Illinois) the state statutes require that drivers give implied consent for a blood draw in a drunk-driving investigation by law enforcement. However, when this consent is explicitly revoked, the Fourth Amendment dictates that police need a warrant to obtain this blood evidence unless exigent circumstances exist. The trial court suppressed the blood evidence and the U.S. Supreme Court affirmed, stating that exigent circumstances did not necessarily exist merely because of the dissipating nature of blood alcohol evidence.
Question Before the Court and How the Court Decided It
Issue: In a drunk-driving investigation, does the natural metabolization of alcohol in the blood stream present an emergency that necessitates an exception the warrant requirement of the Fourth Amendment?
The U.S. Supreme Court has consistently held that whether an exigent circumstances exists is a case-by-case determination made based on a totality of the circumstances. The Court refused to adopt a blanket rule that all blood draws are exigent circumstances. This ruling did not preclude a situation where a warrantless blood draw would be permissible.
What the Court’s Decision Means for Practitioners
Health care practitioners do not want to be put in the position of performing a nonconsensual medical procedure. The implied consent provision in a state’s motor vehicle code will not suffice to protect a practitioner from liability. This case illustrates the murky and turbulent waters of Fourth Amendment law. Where trained law enforcement professionals are unable to gauge what evidence collection process is appropriate, health care practitioners are even more at a disadvantage in understanding the state of the law. Even under direction of law enforcement, blood evidence gathered by a health care practitioner may be thrown out in a criminal prosecution. In order to maintain good working relationships with local law enforcement, health care practitioners need to engage in early, proactive discussions with law enforcement in their communities to prevent a potentially volatile situation. Hinshaw can discuss options for health care practitioners and help determine the best course of action tailored to the individual institution’s needs. We can also facilitate these discussions with local prosecutors’ offices and law enforcement.
Missouri v. McNeely, 599 U.S. ___ (2013)
Related Capabilities
Featured Insights

In The News
Aug 24, 2026
David Schultz Reviews a Humorous—But Important—FDCPA Procedural Ruling

Press Release
Aug 20, 2026
115 Hinshaw Lawyers Recognized in 2027 Editions of The Best Lawyers in America® and Ones to Watch®

Press Release
Aug 20, 2026
Hinshaw’s Landmark Tower Client Project Receives 2026 Top Projects Award

Press Release
Aug 19, 2026
Fernando Rivera-Maissonet Elected as HNBA Region II Governor and Board of Governors Member

Employment Law Observer
Aug 17, 2026
Massachusetts’ First Paid Family Medical Leave Act Verdict Yields $4.75 Million Award

Press Release
Aug 13, 2026
Lauren Campisi Recognized as a 2026 BTI Client Service All-Star by BTI Consulting Group

Consumer Crossroads: Where Financial Services and Litigation Intersect
Aug 13, 2026
How Will Banks Be Impacted by the Proposed Regulation O Amendments?

Press Release
Aug 12, 2026
William Cook Honored With the Distinguished Service Award by the Chicago Bar Association

Webinar
Aug 12, 2026
John Ryan Presents on "Understanding what is Covered Under the TCPA Today"

In The News
Aug 12, 2026
Scott Seaman Analyzes California’s New Pleading Standards for Excess Insurance Policy Claims


