Paradox Collector's Edition One

A series of gruesome murders strike the city of Altinkir. The police are force to work with the Special Investigation Service to track down the killer, as they have better resources. They also have a trump card, Ruko Haruki, a criminal psychoanalyst who walks way too close to the edge of sanity. Will they be able to catch the serial killer, without breaking Ruko, before more lives drop?