The contents of phone log 3.26am, were not known to the defence at the time of the trial, only the time was mentioned...
In order for the full contents of phone log 3.26am to be introduced into evidence, it would have required submission of legal argument because, if the caller to the police had really been Jeremy, what is recorded there was told to the author, by someone who recieved a massage from Jeremy, about what the father had said to Jeremy - which amounts to a clear case of HEARSAY...
On the other hand, if Ralph made the call (3.26am), the contents of phone log 3.26am provide Jeremy with the perfect ALIBI...