Constable Paul Koester and Bush were alone in the interrogation room. Koester claimed Bush attacked him, and that he was being choked from behind to unconsciousness and acted in self-defence. An investigation was conducted by an RCMP team brought in from another region. That investigation was reviewed by several agencies including the Ministry of the Attorney General of BC, and the federal Civilian Review and Complaints Commission for the Royal Canadian Mounted Police. Koester was cleared of any wrongdoing. The Coroner's Inquest into the death reached the same conclusion.