Police in London investigate fatal shooting of sergeant in a custody suite 

Floral tributes were laid outside Croydon Custody Centre in south London after an officer was shot and killed (Aaron Chown/PA)

Investigators probing the fatal shooting of a police sergeant in a custody suite in London are working with a “determination to find justice” for their fallen colleague, a top officer has said.

The suspect in the killing of Sergeant Matiu Ratana at Croydon Custody Centre in south London in the early hours of Friday remains in a critical condition in hospital.