On 18 September 2012 , Police Constables Nicola Hughes and Fiona Bone , two Greater Manchester Police officers , were killed Killing by Dale Cregan in a gun and grenade ambush while responding Response to a report of a burglary in Greater Manchester , England .

On 12 February 2013 , Cregan changed Change his plea to guilty in relation to the murder Killing of the two police officers .

Cregan was sentenced Legal_rulings to a term of whole life imprisonment at Preston Crown Court on 13 June 2013 .