I'm really interested to see what comes of his female guest at the vigil. Accomplice turned informant, or informant from the beginning?
IMO only
This young lady may have met him thru the Fetlife site.
He had big dreams of being a Dom, I am thinking that he told her what he did to Yingying to keep her "in line". A you will be next sort of thing.
I am also thinking he had a recent experience watching or participating in a DOM/ SUB act and this is what triggered him to look for a victim.
With so many willing participants why did he have to kidnap this beautiful young lady???
IMO
His profile was updated within the last 2-3 months. I believe that the experienced participants on that site picked up on his creepy vibe and avoided him.