The heartbroken family of a teenager who perished inside a burning car in Londonderry one year ago has called for those who were with him to come forward and explain why they ran away and left him to die.
Caoimhin Cassidy (18) died on June 1, 2019 when the stolen Mazda car he and others were travelling in ignited after it crashed into a tree in the Galliagh area of the city.
A post-mortem examination showed Caoimhin had minor injuries, and was most likely alive before the fire claimed his life.
Mr Cassidy's grandmother, Margaret, told the Belfast Telegraph she cries herself to sleep every night over the loss of her beloved grandson.
She said: "Caoimhin was brought into my house soon after he was born and he was here until the day he was carried out for his funeral - but since that day I have cried myself to sleep every night.
"I cannot get over the pain of losing him and his mother Christina is worse. I cannot face going out of this house and I sit here thinking Caoimhin is going to come through the door.
"I've only managed to go to his grave once, and I have only been out of this house twice since Caoimhin died."
Mrs Cassidy said it is a struggle to comprehend how those with her grandson left him to die. She continued: "If the people who were with Caoimhin saw the way we are suffering as a family, they would let us know why?
"Why did they all get out of that car run and leave my grandson lying in the car?
"How could anybody do that, knowing that that car was on fire?
"Even if they wrote a letter to me and told me that and said they were sorry - that would be something at least but they way we have been left is terrible."
Mr Cassidy's great-uncle Charles Tierney said he too is tortured by unanswered questions about his nephew's death.
He said: "This has been a nightmare for me too because I saw the video the police have of the whole thing, including how the car hit a lamppost, them going toward houses and then it goes out of view.
"You can see flames but then you see the car in flames.
"That haunts me still but one thing that has puzzled me this whole year is how they (the police) didn't get the car stopped when they knew it was stolen.
"It had come up into the Creggan area then headed towards the border and then came back into the North, so if they were able to video that and they were able to tell me the car stopped in Creggan, it puzzles me why they didn't stop it." Mr Tierney said above all else, the family need answers about the circumstances that led to his nephew's grim demise.
He continued: "We know Caoimhin was not on his own and the police know that, but I don't really think the ones with him have a conscience.
"I would appeal to their friends - those people who know who they are and know what they did. It is to them that I would appeal, come and give names to a priest, a community worker they trust or a solicitor.
"The family are not interested in getting somebody put in prison, all we want to know is why they did what they did."
The detective leading the investigation into Mr Cassidy's death also appealed for anyone with information to come forward.
Detective Inspector Michael Winters said: "The body of 18-year-old Caoimhin Cassidy was found inside a red Mazda 6, which had crashed on the Fairview Road during the early hours of Saturday, June 1, 2019.
"Initially it was believed that the car had caught fire as a result of the collision.
"However, results from the post-mortem examination subsequently told us that Caoimhin was not seriously injured as a result of a crash, and was most likely still alive when the blaze started. We believe that Caoimhin was not travelling alone in the vehicle.
"If you can cast your mind back and remember anything about Caoimhin's movements, or those of the red Mazda 6, on the evening of Friday, May 31, then please get in touch.
"Any detail, no matter how small it might seem, could be invaluable."
Anyone with information is asked to contact detectives at Strand Road on 101, quoting reference number 316 of 01/06/19 or Crimestoppers on 0800 555 111.