I was reading a bit about this subject and was wondering about the specific status of the medical professionals involved.
If I am pulled over for a DUI and the cops take me back to the police station and subject me to a blood test, presumably a trained medical professional such as a nurse or a phlebotomist does the needle stick and draws the blood.
I wonder though what are the legal and ethical considerations for that medical professional? A medical professional's job is to provide care and support for their patients -- "first do no harm". But plainly their actions in this case can at best do nothing and at worst get them in a lot of legal trouble, or perhaps at worst damage the blood vessel or give them an infection -- though obviously that is VERY rare.
Given that you are innocent until proven guilty the only purpose of the test is to prove you guilty, and so the person administering the test is doing so with the intent of doing you harm.
Are medical personnel required to draw blood in support of police investigations even when the patient/suspect is unable to provide consent?