Deceased - Killed by Anita
Fienstein was one of three hunters who paid Titus and Kaspar money in order to go and hunt for lycanthropes. One was Carmichael. The other was only referred to as Grey Hair.
It was rather obvious that while Fienstein was willing to hunt lycanthropes, he became squeamish when outright hurting and killing humans.
Fienstein was eventually shot in the stomach by Anita, who was trying to escape.