In October of 1986, on an ordinary Autumn Thursday, 13-year-old Philip Cairns disappeared. He had just finished lunch at his house in Rathfarnham, Dublin 16 and was walking back to school for his afternoon classes down quiet suburban lanes when he vanished into thin air.  

To this day Philip is one of the most well-known missing persons cases in Ireland. Despite almost 40 years of nationwide searches and appeals, no one has ever been arrested and Philip has never been found. In Part 2 of our series on Philip Cairns we look at the biggest tangible clue in the case - Philip's schoolbag - and the decades of disappointment that followed that hopeful discovery, plus the fresh optimism Pirate Predator's Peter Mulryan has brought to the case. 

If you have any information, please contact our tipline - unsolved@rte.ie 

In October of 1986, on an ordinary Autumn Thursday, 13-year-old Philip Cairns disappeared. He had just finished lunch at his house in Rathfarnham, Dublin 16 and was walking back to school for his afternoon classes down quiet suburban lanes when he vanished into thin air. To this day Philip is one of the most well-known missing persons cases in Ireland. Despite almost 40 years of nationwide searches and appeals, no one has ever been arrested and Philip has never been found. In Part 2 of our series on Philip Cairns we look at the biggest tangible clue in the case - Philip's schoolbag - and the decades of disappointment that followed that hopeful discovery, plus the fresh optimism Pirate Predator's Peter Mulryan has brought to the case. If you have any information, please contact our tipline - unsolved@rte.ie&nbsp;

Some crimes don't get solved. Some families never get justice. Unsolved, hosted by award-winning crime journalist Barry Cummins and RTÉ presenter Katja Mia, is a true crime podcast made in the hope that someone listening knows something. In each episode, we investigate Irish cold cases with the victim firmly at the centre of the story, focusing on the lives behind the headlines, what we know about the crime that took them from their loved ones and the lasting impact it had. Get in touch at unsolved@rte.ie   

Some crimes don't get solved. Some families never get justice. Unsolved, hosted by award-winning crime journalist Barry Cummins and RTÉ presenter Katja Mia, is a true crime podcast made in the hope that someone listening knows something. In each episode, we investigate Irish cold cases with the victim firmly at the centre of the story, focusing on the lives behind the headlines, what we know about the crime that took them from their loved ones and the lasting impact it had. Get in touch at unsolved@rte.ie&nbsp; &nbsp;