Possibly it's important to have confirmation that CB was in possession of his phone at 8pm that night in case he claimed it had been stolen.
I'm sure that would be his main line of defence regarding the phone evidence. The police can prove his phone was there but can they prove he was there with it.
I am intrigued about the phone number. It seems to have been transferred to other users. My only experience of that was when trying to use an old mobile I hadn't used for a while I discovered that its number had been given to someone else. So unless the subscriber had hung onto the number since 2007 and transferred it to each new phone the police will have a monumental task in tracking it.
So much easier had it been done in 2007 with a near local's phone who had a recent Portuguese criminal record.
They seem to be going for people who knew the number and the subscriber from 2007. Have I got that right or do you need to sort me out on it.