I have good news
Oz is fine.
I wrote a private message to his mom on Facebook explaining how we were concerned for him.
She said he is fine. Very busy and his wife is in the US with him right now.
Hopefully she doesn't think I'm creepy for reaching out since she has NO idea who I am. I explained that in the 3 years this thread has been going, he has never had this big of an absence and there was a big concern for him. She seemed very nice and thankful for our thoughts of him. She said she would pass the message on.
What a relief! It's amazing how much you can worry about someone you have never met and probably never will. LOL