Document ID: ./input/supremecourt_opinions/opinions/12pdf/11-1425_cb8e.pdf
Page Number: 27.0

Cite as:  569 U. S. ____ (2013) 

23 

Opinion of the Court 

cial  authorization,  for  in  every  case  the  law  must  be  con­
cerned that evidence is being destroyed.  But that inquiry 
ought  not  to  be  pursued  here  where  the  question  is  not
properly  before  this  Court.    Having  rejected  the  sole  ar­
gument presented to us challenging the Missouri Supreme 
Court’s decision, we affirm its judgment. 

* 

* 
We hold that in drunk-driving investigations, the natu­
ral dissipation of alcohol in the bloodstream does not con- 
stitute  an  exigency  in  every  case  sufficient  to  justify
conducting a blood test without a warrant.

* 

The  judgment  of  the  Missouri  Supreme  Court  is

affirmed. 

It is so ordered.