Peter found
UPDATE: Peter was found yesterday night local time. My dad and brother arrived that day and followed some tips from street vendors who had seen him taken by police that morning. He was in the local jail. They are with him now finding medical care at a hospital as he is not coherent.
Thank you to everyone who helped keep an eye out for him, put up posters, asked around, and spread the word. It made the difference. He was in a bad way when found, no money or belongings and on the street. It is still going to be challenging to get him get him home due to his mental state.