The last known people to have been with missing Jay Slater are two British men who invited him back to their Airbnb hours before he vanished.
For 12 days detectives in Tenerife have searched in vain for the 19-year-old apprentice bricklayer who had arrived on June 12 for a three-day dance festival.
What is known is that on the final day of the rave Jay was dancing shirtless at the a nightclub in Papagayo Beach at 1am when his two friends Lucy Mae Law and Brad Page tried to convince him to go with them back to the apartment where they were staying.
Unmoved, he instead decided to stay with the two strangers he'd apparently never met – and at around 6am got in their car and drove the windy coastal road for an hour to get to their Airbnb.
Jay Slater, 19, (pictured) vanished in Tenerife in the early hours of June 17 after being invited back to a rented Airbnb by two mysterious British men
Jay is pictured alongside mother Debbie and his older brother Zak who have both who has urgently appealed for more information about the two British men he spent time with
After a rave atPapagayo Beach in the early hours of Monday morning, Jay got in a car with the two men who drove him to this Airbnb (pictured) located just outside the village of Masca on the side of a mountain in the Rural de Teno national park, some 20 miles away
Jay posted this photograph of him smoking a cigarette at 7.30am on June 17 - the morning of his disappearance. He is known to have left the property to catch a bus back to the apartment where he was staying. He phoned his friend Lucy Mae Law to say he was lost, thirsty and tired
Now, as there have been no sightings of him since 8.50am on Monday, focus has switched back onto the two men.
So, what is known about them?
Besides the fact that they are British, black and in their late 30s to early 40s, very little.
One is said to go by the nickname Johnny Vegas and one is described as around 6ft, stocky and with short dark hair. He was seen with an orange wristband but little else is known about the other man.
Witnesses say they were seen drinking Hennessey cognac in bars and nightclubs in the party resort of Playa de las Americas during the NRG festival.
They are known to have driven Jay back to their £40-a-night two-bedroom apartment,located just outside the village of Masca on the side of a mountain in the Rural de Teno national park, some 20 miles away.
Friends of Jay were sent a picture of him inside the car of the two men and this has been shared with investigating officers.
At 7.30am Jay is believed to have left the apartment and sent two Snapchat images of himself outside – one showing holding a cigarette and the other a view of the valley.
A social media post on Snapchat (left) showed Jay wearing a grey and green t-shirt before he vanished.Jay was also pictured at a pool party on June 15 - two days before he vanished
At some point he tried to catch a bus back to his apartment. But after being told that the next one wasn't until 10am, he seemingly tried to walk back.
At 8.50am Lucy says after Jay phoned her to say he was 'lost in the mountains, with no water and one per cent battery'. His phone 'pinged' outside a restaurant in Masca at 8.51am and that was the last sign of him.
The men have been questioned by Spanish police, but the family were surprised that they have been allowed to return to the UK despite them being among the last people to see him.
But what is puzzling is just why two men in their late 30s, early 40s would rent an apartment to far away from the buzz of Playa de las Americas and drive their every day.
It is known that the two did not know Jay - but they are said to associates of Lucy.
It has also emerged on social media that police are investigating the theft of a Rolex watch from outside Papagayo's nightclub just hours before Jay vanished.
There is no suggestion apprentice bricklayer is involved in the theft, but it is known that a large fight erupted outside Papagayo just as the NRG festival afterparty wrapped up.
There have been reports on social media that the watch was seen in the car of the two men, but MailOnline has been unable to establish this.
The men booked the AirBnB for the whole of the NRG festival. They were due to leave on June 17 but after Jay disappeared, they were asked to stay on an extra day.
The mountain range in Rural de Teno near the village of Masca where police are searching
Emergency services have been searching the area using helicopters and drones
Jay's father Warren and his mother Debbie are pictured joining the search for their son
Jay's friends have flown out to Tenerife to try and help locate the missing teenager
Police questioned them at length, took their passport details and then allowed them to fly home.
Friends of Jay say they sent Snapchat images of themselves at Gatwick airport after leaving Tenerife.
TV sleuth Mr Williams-Thomas, who is working with the family, has said he has been given a picture of one of them and will release it if they don't come forward.
He added: 'The family are desperate for these men to come forward as witnesses. They are not currently assisting.
'The group sat outside on the wall outside the club after the night ended. What we don't know is why he went with them.'
Last week Lucy told MailOnline how she had 'tracked' the men down to their apartment using the Snapchat images Jay had sent her – arriving there at 11am two hours after he vanished.
However, she told MailOnline:' They seemed startled and surprised that I had found them, and I asked them where Jay was.
'They said he had gone out for a cigarette and the come back and he was leaving to try and get a bus back into town.
'They just seemed shocked that I had managed to find them and I know police have spoken to them but I've seen found out they have left the country. They need to be spoken to properly.'
A police spokesperson told MailOnline: 'We are continuing to not disclose details of our investigation, which is still open and we are carrying on with the search operation.'
