Cannabis addict Louis De Zoysa convicted of murdering Sergeant Matt Ratana
Mr Ratana shot dead at police station in Croydon after De Zoysa was being processed for drugs arrest
He had then manufactured his own bullets to fit the gun in a rented workshop on farmland in Banstead, Surrey.
Police officers stopped De Zoysa on the night of 24 September 2020 as he walked along a …