If the police ask you to take a blood test after a DUI stop, you can refuse. However, if they have a warrant, you cannot legally refuse the test. Therefore, getting such a warrant is the easiest way for the police to determine if you're drunk, if you do not voluntarily submit to the test.
Woman arrested over deadly DUI crash has immigration hold
A 29-year-old woman in California was involved in a deadly accident at the end of June. The woman's car allegedly left the road, drove up onto the sidewalk, and ran into a 69-year-old man. The impact severed his lower leg, which landed on the back of her car. He was thrown through the windshield and into the passenger seat. Some of his clothing was torn off by the impact.