The prime suspect in the Madeleine McCann case has been moved to a new high-security prison dubbed the Alcatraz of the North.
Christian Brueckner, who German investigators believe murdered Madeleine in 2007, is now in solitary confinement at Oldenburg prison near Bremen, north-west Germany.
Covered with CCTV cameras, all the doors and windows within the walls are made from special reinforced safety glass so guards can keep an eye on prisoners at all times.
Escape is thought to be almost impossible at the high-tech facility, which is surrounded by a 22ft wall - although one prisoner fled after befriending a guard.
Brueckner’s lawyer Friedrich Fuelscher, declined to comment on why his client had been transferred.
But it is believed it was in his best interests after he fell and broke his ribs in a scuffle with guards at a jail near Braunschweig.
He had been housed at the grim Wolfenbüttel prison, which is where the Nazis executed several hundred World War II inmates.
He had previously been held in Kiel but was unhappy there because he was being bullied by other inmates for his link to the McCann case.
Madeleine was snatched from her bed at the holiday resort of Praia da Luz, Portugal, in 2007 when she was three.
Convicted paedophile Brueckner, 44, fled to Portugal in 1995 after completing a two-year sentence for abusing a child.
He is now serving a seven-year jail term for raping a 72-year-old US woman in the Algarve in 2005.
German prosecutors are currently compiling evidence against Brueckner.
In May, the drifter branded the investigation against him “scandalous” in a letter penned from his cell.
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