If You Gave Blood Under Duress, Get a Lawyer
The right to privacy and the right to keep from doing anything that might incriminate you are still protected.
Police Cannot Force Blood Tests - The Supreme Court (SCOTUS) ruled that police cannot forcibly take blood samples in a DUI case. Any compelled intrusion into the human body implicates privacy interests. Correction to Video: The SCOTUS vote was 5 to 4.