Warning this article contains contents some may find disturbing.
A disturbing message by Christian Brueckner, the man German police think killed Madeleine McCann, has come to light.
British and German authorities revealed in 2020 the 46-year-old convicted paedophile is the prime suspect in the case of McCann, who disappeared from an apartment in Praia da Luz, Portugal in May 2007.
While British police continue to treat the investigation as a missing persons one, German prosecutors say they believe the girl is dead.
Hans Christian Wolters said in December 2020 he was "very confident" charges would be brought against Brueckner and felt the public would come to the same conclusion "if it knew the evidence we had".
No charges have been filed against Brueckner but he remains the prime suspect.
On Wednesday German newspaper RTL revealed a disturbing message sent by Brueckner in an online chat.
Brueckner went by the username "madness-der-holger" and said he wanted to "capture something small and use it for days, that's it."
His chat partner, "Wahnsinn-der-holger", reportedly replied: "Oh, if the evidence is destroyed afterwards."
RTL said that officers had become aware of the online chats after Brueckner's girlfriend reported him in 2015 for an attack and police searched his home.
Police reportedly found files with child pornography on them.
A new television documentary, which is yet to air, claims Brueckner isn't the killer.
The three-part show features ex-detective Mark Williams-Thomas investigating Brueckner's connection to the disappearance.
A promotion for the three-part show says Williams-Thomas has secured interviews with Brueckner's accusers, former friends, neighbours and others who have never spoken to media.
The Sun reports a source as saying the show has "concluded B could not have snatched Madeleine" as his alibi "stacks up".
"He was 30 minutes away and was not on the phone in Praia da Luz the night she vanished."
The Sun and other media report the case against the German man is now "set to crumble".