Английское предложение с has not communicated

He has not communicated with his old friend and former colleague since he supposedly died and vanished into what is called a level-one protected-witness program designed uniquely for him and jointly controlled by London's Metropolitan Police, Washington and Interpol.
‘Because,’ said Kennedy with frankness, ‘it seems incredible to me that, if Helen is still alive, she has not communicated with me all these years.
‘Doubtless her alibi is satisfactory, but Japp has not communicated it to me as yet.’