Cameron: Whole country shocked by police deaths
21 September 2012 Last updated at 13:53 BST
The Prime Minister, David Cameron, has been to Manchester following the murders of two police officers to pay his respects.
29 year old Dale Cregan has appeared in court charged with the murders. He was also charged with murdering a father and son in separate attacks in May and August, and with four attempted murders. He was remanded in custody.