 Police caught Carty through CCTV footage which showed him using Pryce 's Oyster Card ( which he claimed to have found ) at Kensal Green station , forensic evidence found at the homes of Carty and Brown , and Pryce 's mobile phone . Carty and Brown both denied murder but admitted that they had robbed Pryce and another man just before . Brown was 17 at the time of the offence so initially could not be named for legal reasons . 
