Can a police officer draw a defendant's blood without a warrant?

The blood draw here occurred in 2011, well before McNeely was published. At the time, Warren was operating within the law by drawing defendant's blood without a warrant. Under these circumstances, exclusion of the evidence would be inappropriate. "Exclusion is 'not a personal constitutional right,' nor is it designed to 'redress the injury' occasioned by an unconstitutional search. [Citations.] The rule's sole purpose, we have repeatedly held, is to deter future Fourth Amendment violations." (Davis v. U.S. (2011) 564 U.S. 229, 236-237.) "Exclusion exacts a heavy toll on both the judicial system and society at large." (Id. at p. 237.) "[W]hen the police act with an objectively 'reasonable good-faith belief' that their conduct is lawful, [citation], or when their conduct involves only simple, 'isolated' negligence, [citation], the '"deterrence rationale loses much of its

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