Although police were at a loss to explain Ansell's motive (he could have easily escaped the roadblock had he chosen to), it was later determined that Ansell had been raving about Freemasons prior to his death; he was distraught, apparently convinced that Freemasons had kidnapped his two sons and were now stalking him. During the coroner's inquest, psychiatrist Robert Parker made the following observations on Ansell's mental state before his death:There is no doubt that Ansell was affected by amphetamine intoxication prior to his fatal interaction with Sergeant Huitson...Ansell's behaviour prior to the initial shots being fired is consistent with amphetamine intoxication with restlessness, hypervigilance, anxiety, anger and impaired judgement (DSM IV). He was also affected by a paranoid psychotic state which is typical of chronic amphetamine use.