Police officers pay their respects after laying flowers near to the scene of the shooting of WPCs Nicola Hughes and Fiona Bone in Hattersley on September 20, 2012 in Manchester, England. Local man Dale Cregan, 29, has been arrested in connection with the shooting of WPCs Nicola Hughes and Fiona Bone, who suffered fatal injuries in a gun and grenade attack in Mottram, during a routine call to investigate a burglary in Abbey Gardens on Tuesday.