Source: Rise of the Runelords Anniversary Edition, pg(s). 81-82
Grayst Sevilla is a Varisian thug from Sandpoint who is currently being held in Habe's Sanatorium. He was apprehended and is suspected in the brutal murders of three known con men (Tarch Mortwell, Lener Hask, and Gedwin Tabe) near Cougar Creek. However, he is also a victim - Sevilla was with the men when they were captured and killed by the Skinsaw Man. Sevilla went insane from the spectacle and was infected with ghoul fever by the Skinsaw Man along with a message for his obsession.