I knew Jack Leitner. He was my professor at the University of North Florida in Jacksonville, Florida. After I graduated, Jack was my mentor as I served in an Adjunct professor role for four semesters.
I remember when Jack decided to move to Thailand. I was happy for him, but sad to see him leave. I thought he might return to the States after a few years, but he grew to love his new home. We exchanged a few e-mails through 2006, but I hadn't heard from him since then. At one point, I had my passport and visa ready to go and visit, but I ended up not going. I wish I had gone.
I'm very sorry to hear of his passing. I had great respect for him, and I remember many of the positive things he said to me over the years I knew him.
If anyone can post a picture of him, that would be a nice thing to do.