Family member took off overseas

Hi all - we’re at a total loss on what to do, so im turning to Reddit for any ideas.

One of my family members (38M) was diagnosed paranoid schizophrenic two years ago. He had one hospitalization, complied with the medicine requirement for about 6 months, and hasn’t been medicated since. He lives with my in-laws and they’ve been gracious in keeping him fed and a roof over his head, despite his delusions getting worse and worse, often targeting them. For example, he tried to blackmail my FIL threatening to “expose his affair” (my FIL had a stroke and cannot drive himself, not sure how he’d ever have an affair…). His delusions center around the government and military, and conspiracies in general. He recently has begun speaking in his own “language”. He very much has anosognosia and refuses to ever see a doctor. He has managed to accumulate a lot of credit card debt (unable to keep a job for obvious reasons).

A few days ago, he stole my MIL’s credit card, booked a flight to Poland (he has never been and does not speak Polish; born and raised in Texas), and withdrew $1000 from her account. He sent a text saying he’s going to Poland, and will be “gone forever”, then left his car at the airport with her card in it. They have since retrieved the car and credit card.

He did have a passport at one time but we’re not sure if he was able to renew it. If he did manage to actually get overseas, I don’t believe he has any way of getting back. He knows nobody, doesn’t speak the language, and is in major psychosis. I’m afraid he’s wandering around the country essentially homeless, if he even made it there.

My questions for you all - has anyone ever dealt with something like this? Is there any way we can find out if he actually left the country (he won’t respond to texts or calls). Is this something we could contact the embassy about? Anybody live in Poland that could speak to their mental health resources? Any other ideas or advice? My in-laws are worried sick.

Thanks for reading if you’ve made it this far. ❤️