I suspect the thread will bomb because they won't be any cohesive arguments.
But here goes, the alleged confession to his mates, he might have been in Luz although the BKA cannot with any kind of conviction say he was there. He's alleged to have robbed apartments, the MO is not similar in so far as no other children were allegedly abducted.
Yes, Brueckner is alleged to have confessed to Busching at a kite festival in spain 2008.
That's our first piece of evidence for the list.
Exhibit A -
An alleged confession.
State's Witness No. 1: Helge Busching...............
Helge Busching says he is the man who gave Brueckner's name to British police in 2017, around the 10th anniversary of Madeleine's disappearance.
Busching, 48, claims that Brueckner told him at a Spanish kite festival in 2008 that he was involved in Madeleine's abduction from Praia da Luz a year earlier.
Nine years later, after Busching was arrested for smuggling migrants in Greece, he said he wanted to speak to British police and was questioned by Madeleine detectives in Athens.
Busching's statement to police spoke of a 'German male person, whom I know by the name of Christian' and promised to 'talk in detail' about Brueckner's alleged connection to Madeleine.
https://www.dailymail.co.uk/news/article-8720485/Witness-helped-launch-Madeleine-McCann-investigation-says-Christian-Brueckner-guilty.html