Sky News Australia | Suspicious package sent to Troy Buswell's electorate office is flour, police confirm ABC Online Police have confirmed that powder found leaking from an envelope sent to former West Australian treasurer Troy Buswell is flour and is harmless. Mr Buswell's Busselton electorate office was locked down after police received a report of an envelope leaking ... Flour found in Buswell letter Police say Buswell letter contained flour Suspicious powder deemed harmless |