My husband voluntarily admitted himself to a facility due to suicidal thoughts. He has been in the facility for longer than 72 hours. He want to now leave and was threatened that if he attempted to check himself out they wold deem him 5150 and put a 72 hour hold on him. Their assessment of him is based on 1 sixty second conversation with a psychiatrist that consisted of 3 questions, one of which was re you giving suicidal thoughts, to which the answer was no. Can he leave of his own free will? Can these people force him to stay?
You need to consult with the psychiatric ward and see what their policies and procedures are.