The prime person of interest in the widely publicized disappearance of the young British girl has been freed from a German prison, where he was completing a sentence for an separate crime.
Christian Brückner was driven out of prison by his legal representative. He remained out of sight in the car, but authorities stated his exit from the detention center.
He had been convicted of raping an elderly woman in the Portuguese resort in 2005 and will be fitted with an electronic monitor after his exit.
Brückner, 48, has never been charged with offenses linked to the McCann case. He denies all connections.
Madeleine disappeared in the Portuguese resort of Praia da Luz in 2007. She and her siblings had been left sleeping in a rental unit while her mother and father, Kate and Gerry, were dining at a local eatery.
The case has grown into one of the most widely known unsolved missing person cases globally.
Investigators in Germany have pointed to evidence—including cellphone records—indicating Brückner may have been in the area when she vanished, and have repeatedly insisted that they believe he is the perpetrator.
However, they have lacked sufficient proof to bring charges.
Brückner, who spent many years in the southern Portugal, was a drifter, a petty criminal, and a convicted sex offender. He has several prior offenses, among them sexually abusing minors in the mid-90s and recent years.
Authorities from both police carried out a fresh search between where the McCanns had been staying and addresses linked to the suspect in June this year, but this did not produce new leads.
Last year, the search team carried out searches near the a local water source, about 50 kilometers from Praia da Luz.
The man was present in the Praia da Luz area between 2000 and 2017 and had photographs and videos of himself near the reservoir.
Months ago, the suspect was cleared of separate sex crimes by a German court, which were said to have occurred in the country between 2000 and 2017.
Because of differences in legal systems, German authorities believe him of homicide in connection with Madeleine McCann, while UK authorities continue to treat her case as a unsolved disappearance matter.
Financial support allocated for the Met's investigation has totalled more than 13 million pounds since over a decade ago. A further £108,000 was approved from the UK authorities in April.
Madeleine McCann went missing in the previous decade, at the age of three.