text: Brother Confirms British Hostage Is Dead BAGHDAD, Iraq - British hostage Kenneth Bigley, who pleaded tearfully last month for Prime Minister Tony Blair to meet his kidnappers' demands, was beheaded by his captors, his brother said Friday.   "We can confirm that the family has now received absolute proof that Ken Bigley was executed by his captors," Phil Bigley said in a statement he read on national television in Britain...