A PMHNP is evaluating a 45-year-old patient in the emergency department who was brought in by police after being found wandering in traffic, talking to himself, and appearing disoriented. He is disheveled, malodorous, and has not eaten in days. He refuses all treatment and wants to leave. He states he is "communicating with God" and that he is "on a mission." He does not know the date, where he is, or why he was brought to the ED. What is the PMHNP's appropriate course of action?