@missmyboy Yes, it is an unthinkable nightmare. Continue to reach out to him. Perhaps you will find where he is and contact the right authorities. You don't mention his age or how long he has been sick...if he had any treatment in the US. If he had a former mental health treatment team, is there anything they can do? At this point, if you didn't know before, he is suffering from paranoid schizophrenia and needs medication for stabilization. Perhaps "something" will happen in the Philippines and he will be brought to the attention of police or mental health and he will be admitted to an impatient psychiatric facility there. In the meantime, please take care of your health. And try to think - all of this, right now, is out of your control completely. And if a mother of faith - give this burden to God/Higher Power.
I will pray for you.