He faked a heart attack and persuaded prison staff to take him to hospital.他假装心脏病发作，说服狱警送他去医院。The alert was started by another inmate who tipped off prison staff.另一名向监狱工作人员告密的囚犯按响了警报器。There had been death threats against prison staff.有人对监狱管理人员发出了死亡威胁。