>>3281032I've had people in my family reunite with someone who was kidnapped over thirty years ago. It's nice to meet my cousins for the first time.
Did this person willingly leave or just somehow silently went ghost? You could try and think of people whom you think they'll contact and tell that third party person that if your sibling contacts them to call you because you love and care about them. If you use that as your reason, people will comply.