But they're not expected to know more about the law than the cops.
No, that's not true at all. You have to know a lot about patient rights to work in a hospital including HIPAA and in this case you need to know about blood draw consent and policies with police requesting such.
...and now to watch your head explode...
Loren, it turns out the patient was actually a cop. His full-time job was driving a truck but he was a reserve officer in Rigby. Here is Rigby Police Department on it:
https://m.facebook.com/story.php?story_fbid=1283530118423671&id=981095758667110
So, why are you protecting this cop exactly, when the police department he is working for says he was wrong, when another police department also says he was wrong, when the Constitution says he was wrong? Are you that much of an authoritarian that you can't accept police are wrong even when the police they work for say they were wrong in treating other police wrongly?