Senior detective outlines fresh evidence and theories on prime suspect Christian Brueckner as he nears release

A senior detective involved in the investigation into the disappearance of Madeleine McCann has presented new evidence and theories about prime suspect Christian Brueckner as the convicted German offender is due to be released from prison after serving a seven‑year term.

Brueckner, who served that sentence for the 2005 rape of a 72‑year‑old American woman in the Algarve resort of Praia da Luz, was named by German authorities as the prime suspect in Madeleine’s disappearance in 2020. He has not been formally charged in relation to Madeleine’s case and has other convictions for child sexual abuse, drug offences and forgery.

The findings are set out in ITV’s documentary Madeleine McCann: Searching For The Prime Suspect, which follows criminologist Dr. Graham Hill, a former senior Metropolitan Police detective who was sent to Portugal in the early stages of the inquiry, as he returns to Praia da Luz. The programme brings together interviews with journalists, former associates of Brueckner and people who lived and worked in the area at the time of Madeleine’s disappearance in May 2007.

Journalist Rob Hyde, who has covered the case in Germany, told Dr. Hill that Brueckner had a long history of evading police and links to organised crime, saying there were places with no extradition treaties where he could seek refuge. A former associate, Helge Busching, described a remark Brueckner made at a Spanish festival in 2008 that Busching said led him to believe Brueckner knew details about a child theft; Busching later reported his concerns to investigators but his initial message was lost amid tens of thousands of other calls and tips.

Another former associate, Dieter Fehlinger, recalled being shown Brueckner’s camper van in the spring of 2007 and said Brueckner joked that a hiding place inside was "so big that you could hide a small child inside." An expatriate who encountered Brueckner in coastal camping areas said he had observed what he described as predatory behaviour toward young girls and that Brueckner sold drugs locally.

Victim testimony forms part of the material revisited in the documentary. Irish tour guide Hazel Behan testified in court that an intruder assaulted her in 2004 at a Praia da Rocha apartment, tying her and recording himself raping and abusing her. Behan said she was "100 percent" certain that Brueckner was the man who attacked her. German prosecutors brought charges in 2024 that included that attack and multiple counts of rape and child sexual abuse committed in Portugal between 2000 and 2017.

Police searches of a disused factory Brueckner owned in Neuwegersleben, Germany, in 2016 produced a cache of material that investigators described as highly disturbing. Officers found USB sticks and video files that prosecutors later characterised as depicting child sexual abuse, some involving Brueckner, and discovered more than 70 children's swimming costumes in a Winnebago on the site. The material was documented in investigative files but was later excluded from a 2024 criminal trial because of technical irregularities with the search warrant, a decision that the senior detective and others in the documentary said hampered the prosecution.

Dr. Hill and others involved in the programme point to a number of pieces of information they say connect Brueckner to the Praia da Luz area and to offences against children: his employment history in the Algarve, previous convictions for sexual offences, witness statements about his presence near holiday complexes, online chats recovered by German investigators and the items seized at his properties.

Among the digital material aired in the documentary are Skype messages discovered in a separate 2014 police inquiry into an adult suspect that included exchanges between a user identified as Brueckner and another accused paedophile. In those messages Brueckner is reported to have discussed making films and capturing "something small and use it for days," language prosecutors say is consistent with the offending alleged in other cases.

Brueckner was deported back to Germany in 2017 after an incident in the Algarve in which he was accused of exposing himself to children. While serving the seven‑year sentence for the 2005 rape of the elderly woman, he wrote to British newspapers questioning what evidence linked him to Madeleine and asking where any body or DNA evidence was located.

In 2024 a German court acquitted Brueckner of several charges after prosecutors were unable to rely on material seized at the factory and other exhibits. Dr. Hill told ITV that the excluded material was "damning evidence" and could have made the difference in securing convictions. German prosecutor Hans‑Christian Wolters said in an interview that investigators still consider Brueckner the prime and, to date, the only suspect, and that no evidence has come to light to exonerate him. "We really only have evidence that points to him as the perpetrator. But as to whether we can prove it, prove it in a court of law, that is the big task that lies ahead of us," Wolters said.

Mental health assessments completed as part of the German proceedings described Brueckner as a dangerous offender with a high risk of reoffending, statements in the documentary note. Defence lawyers and others have challenged aspects of the case against him, and German courts excluded significant forensic material on procedural grounds.

Portuguese investigators have faced scrutiny over whether earlier police work missed opportunities to identify Brueckner as a suspect. Records cited in the programme suggest that convictions in Germany for sexual offences and other crimes were not always reflected in Portuguese court papers or routine checks, which investigators say may have limited the lines of inquiry available to officers in Portugal in 2007.

German authorities named Brueckner their prime suspect in 2020 and have continued to investigate. Prosecutors say evidence recovered over a number of years points to his involvement, but no charge in relation to Madeleine has been filed in a court that resulted in conviction. His impending release from the German sentence presents new challenges for investigators and for those searching for answers about Madeleine McCann’s disappearance, who have campaigned for information for nearly two decades.

Representatives for Brueckner did not respond to requests for comment in relation to the documentary. German prosecutors have said investigations will continue and that any future charges would rely on evidence that can withstand scrutiny in court.