MADELEINE MCCANN vanished from her family holiday in Praia da Luz, Portugal in 2007.
The then-three-year-old was sleeping with her younger twin siblings when she went missing, sparking a global investigation to find out what happened.
Who is the new Madeleine McCann suspect?
Metropolitan Police took over the investigation - known as Operation Grange - in 2011.
But they had hit several dead ends in the hunt to find the truth behind what happened to Madeleine.
However, new findings have revealed that a German prisoner could be the man to have kidnapped the youngster.
The name of the suspect has not been revealed but he is a sex offender, currently serving time for drug offences.
The paedo has been described as being white with short blond hair and of slim build at around 6ft tall.
The new suspect - who was 30 at the time of Maddie's disappearance - has twice been convicted for sex crimes against young girls.
He is also a known burglar of hotels and holiday apartments, according German Federal Crime Agency (BKA) crime director Christian Hoppe.
German police - who are treating the case as a murder inquiry - believe he initially planned to rob the holiday apartment before he "moved onto a sexual motive".
How was the suspect identified?
The new prime suspect was already known to British and Portuguese police in relation to Madeleine's disappearance in Praia da Luz.
Yet, the latest information came from a witness who stepped forward following the appeal by the Met Police on the tenth anniversary in 2017.
The suspect - who is 43 now - is believed to been leading a "transient lifestyle" at the time, as he travelled between Portugal and Germany.
It is believed he was living in the Iberian nation between 1995 and 2007 working in the food industry.
The man is known to have been in the area at the time of Madeleine's disappearance, having taken a 30-minute phone call an hour before she went missing.
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Scotland Yard also revealed that a 1980s VW T3 Westphalia white campervan has been linked to the suspect, and was seen in Praia da Luz days before she vanished.
He is also believed to have been living in it in the days and weeks before and after the disappearance.
A 1993 Jaguar XJR6 has also been connected to the German sex offender, with one of the two vehicles believed to have been used the kidnapping of Maddie.