Prime Minister David Cameron and opposition leader Ed Miliband have both paid tribute in the House of Commons to the Essex policeman Ian Dibell.
The off duty PC was shot dead as he attempted to intervene in an incident in Clacton-on-Sea.
Detectives trying to reconstruct the last moments of a gunman who killed an Essex police officer have issued an appeal for information.
A special church service has been held in Clacton today- to help people in the community affected by the murder of PC Ian Dibell.
People living in Clacton-on-Sea have been paying tribute to PC Ian Dibell