The interviewees were unaware the case had changed from a search for a missing person into a murder inquiry.
He was sentenced to life imprisonment, with the trial judge ordering that he never be released from prison.
It is in memory of a man named Cantiorix and the Latin inscription is Cantiorix hic iacit/Venedotis cives fuit/consobrinos Magli magistrati: "Cantiorix lies here.
He was a citizen of Gwynedd and a cousin of Maglos the magistrate".
The following day, the Prime Minister, David Cameron also issued an appeal to the public, commenting, "clearly having this happen to you, and the fact that she suffers from cerebral palsy, something I know a little about from my own children, only makes this worse. If you know anything, if you saw anything, heard anything, have any ideas you can bring forward, talk to the police." and on 22 April, police confirmed that the search had officially ended.
The police stated that "a reactive team of specialist officers are available to respond to any new information that is received." Mark Bridger, a 46-year-old local man, was arrested on the afternoon of 2 October 2012, the day after April went missing.