[citation needed] He presided over an external police inquiry into allegations in Northern Ireland of collusion between the British security services and loyalist paramilitaries in a series of killings during the Troubles.
A subsequent government ordered review by Sir Desmond de Silva, QC, announced in December 2012, confirmed the findings of the Stevens 1, 2 and 3 Inquiries regarding collusion between British security forces and loyalist paramilitary groups in killings in Northern Ireland, which resulted in 97 convictions, [citation needed] and a large number of recommendations, which were accepted.
[2] He headed a Metropolitan Police inquiry, Operation Paget, into the death of Diana, Princess of Wales, on 31 August 1997, which reported its findings in 2006.
Lord Stevens was asked by the Conservatives, under David Cameron, to be their candidate for the London Mayoral elections.
[7] Since 2014, he has been Chairman of the private investigative and security consulting firm Quest Global Limited, where he is also a person with significant control.
[citation needed] He is a Fellow of Wolfson College, Cambridge, and was a visiting professor at City University of New York (CUNY).
[citation needed] Lord Stevens holds a Commercial Pilot's Licence and is part owner of several aircraft.