Mandatory Credit: Photo by Grant Falvey/LNP/Shutterstock (10791015at) A rugby shirt memorial for Sgt Matt Ratana at Croydon Custody Centre. A murder investigation has been launched by police after the death of custody police sergeant Matt Ratana at the Croydon Custody Centre in South London yesterday.Photo credit:Grant Falvey/LNP Croydon custody flowers, Croydon, South London, UK - 26 Sep 2020