Seth Elliot

Seth Elliot is a serial killer as well as a criminal accomplice and copycat of Martin Feiser who appeared in Ceremony of Innocence in Profiler.

Modus Operandi
Elliot almost completely copied Feiser's MO down to a T, even using the same gun Feiser used that was never found. They communicated about Elliot's kills with pictures of chess moves and states, the notations signifying messages and instructions.