In April, Bruckner was officially recognized as a suspect. He is in prison in Germany for raping a woman in Praia da Luz, Portugal, where Madeleine disappeared in 2007 at the age of three.
He was subjected to an identification procedure, which involves taking photographs of physical characteristics, including scars, tattoos and birthmarks, according to the German prosecutor’s office in Braunschweig.
Hans Christian Wolters, who has been investigating Madeleine’s case since 2020, told German media that information gathered during the physical examination will be compared with descriptions of the possible perpetrators provided by witnesses.
Bruckner is being investigated for alleged sex crimes, including two counts of assault and three counts of rape, in addition to Madeleine’s disappearance.
Mr. Walters said at a news conference on Friday that Mr. Bruckner’s lawyer, Friedrich Fülscher, still had time to comment on these additional alleged crimes before a decision on charges was made.
German daily TZ reports that Mr Fülscher told new agency Deutsche Presse-Agentur that he had not yet received the results of Bruckner’s physical and could not comment on the measure.
Bruckner previously denied any involvement in Madeleine’s disappearance from her bedroom during a family vacation.
In May, it was suggested that evidence linked to Madeleine had been found in Bruckner’s van, which was being used at the time she disappeared.
The van has been in the hands of the German police since June 2020.
Bruckner lived in the Algarve from 1995 to 2007.
He has been behind bars in Germany since 2019 for the rape and robbery of a 72-year-old American woman in the Algarve.
Madeleine’s parents, Kate and Gerry McCann, said in a statement released in April: “We welcome the news that the Portuguese authorities have declared a German ‘arguido’ in connection with the disappearance of our beloved daughter Madeleine.
“This shows progress in the investigation being carried out by the Portuguese, German and British authorities.
“Although the probability is small, we have not given up hope that Madeleine is still alive and we will meet her again.”
This year marks 15 years since Madeleine disappeared from her bedroom while her parents were eating with friends at a nearby restaurant.
The apartment was broken into while Madeleine and her twin siblings were sleeping. The local police came to the conclusion that it was a kidnapping.
However, the McCanns expressed their dismay at what they described as the slow, initial police response and failure to secure the crime scene.
The McCanns appealed to the media to help find Madeleine, and the case attracted worldwide attention, with soccer stars David Beckham and Cristiano Ronaldo joining appeals for information.
Additional reporting by Monica Pallenberg