An ex-detective who helped Jay Slater’s family when the 19-year-old went missing in Tenerife has claimed that the Spanish police ignored a key piece of evidence.
Mark Williams-Thomas has accused Spanish authorities of failing to investigate an audio recording he offered to share which may have shed light on the British teenager’s disappearance.
In a shocking seven-minute long video posted on X/Twitter on Friday, Mr Williams-Thomas reveals the alleged difficulties he faced when dealing with the police in Tenerife.
‘I sent the information I had in an email to Spanish authorities. the ex-detective said.
‘I told them I wasn’t able to share the audio recording at this point because I needed to explain to them how I had obtained it and also I was very conscious that it was highly sensitive and I didn’t want it just being shared all around.
‘They’ve never come back to me,’ he added.
Suggesting a reason why Spanish cops allegedly did not work with him, Mr Williams-Thomas said that authorities in some countries ‘really don’t like working with the public to get information, they think they always know the answers’.
The caption of his revelatory post on X reads: ‘Certain cases attract huge media attention and the landscape is so different now with social media and the internet.

Jay Slater (right), 19, went missing in the early hours of June 17, 2024

Mark Williams-Thomas (pictured) has accused Spanish authorities of failing to investigate an audio recording he offered to share
‘What is always key for me is the end game, “JUSTICE” (which takes many forms), which is why I always work with the authorities.
‘However some authorities and countries are open to receiving information better than others.’
His bombshell claims come as an inquest into Jay’s death was launched at Preston Crown Court this month.
This is a breaking news story. More updates to follow.