The Dresden Files: Portland
Killian Eris is a professor of anthropology at the University of Portland. He was a former protege of Elder Eaglestaff, but the two have apparently had a falling out. He is the foremost expert on the folklore surrounding Mount Hood (Wyeast) and has just returned from a sabbatical in the southwest in which he was studying the legends of the Thunderbird.
It was discovered by Yuriko Nakamoto, Dillon Krister, and Nick Salieri that Eris most likely killed a student of his named Danielle Fletcher for one of his rituals. It was speculated that he was breaking seals located beneath Mount Hood to call forth some sort of spirit that the Chinook elders kept at bay with their monthly rituals. With the help of Elder Jack Sigo, the three managed to thwart Eris during one of his next full-moon rituals. He was tranquilized and taken away by Jack Sigo to face justice at the hands of the tribe.