It is important to note that the police officer arrested her because his supervisor ordered him to do so if she refuses.
Due to that it is possible that the officer, seeing his job threatened, did not feel he had another choice.
Source of this information: http://www.sltrib.com/news/2017/08/31/utah-nurse-arrested-af... - "Payne [...] said he was advised by Lt. James Tracy, the watch commander on duty that night, to arrest Wubbels for interfering with a police investigation if she refused to let him get the sample [...]"
Pretty sad that the washington post would fail to report such a crucial detail.
Due to that it is possible that the officer, seeing his job threatened, did not feel he had another choice.
Source of this information: http://www.sltrib.com/news/2017/08/31/utah-nurse-arrested-af... - "Payne [...] said he was advised by Lt. James Tracy, the watch commander on duty that night, to arrest Wubbels for interfering with a police investigation if she refused to let him get the sample [...]"
Pretty sad that the washington post would fail to report such a crucial detail.