Why did he not have a solicitor? Never agree to be interviewed unless you have a solicitor present. He needs to, at this point, think very carefully about what happened from the point of his firs contact with police. where did they arrest him, how did the arrest him, did they read him his rights properly, did he have access to a phone to call someone, was he offered a solicitor. If anything in the manner of the above was not done properly then whatever he said might be irrelevant. How old was he at the time of the interview, do you know?