We know who, but cannot prove it. My attorney is now seeking a report to see if we can push a little further. Sorry to not have posted earlier, but it takes time and we will see.
For those who worry, you do not need to, I have been displaying knifes at shows for over 30 years and this is the only one stolen during a show. The knife community is 99.999% good people and we can't let one bad apple color the rest.
There is no other place that I would chose to me and I thank all who responded and keep their eyes open. She is one of a kind and will show up some day. I only hope she finds a good home.