It's in the article in my previous post here the quote fro that article:
Upon arrival in Amsterdam, the German had suddenly disappeared, according to the
Braunschweiger Zeitung and Bild . It is not known how he managed this and where he went afterwards. Brückner apparently traveled unnoticed to Italy, where he applied for a new passport at the German consulate in Milan. He was arrested on 27 September 2018 when he received the ID. This on the basis of a European arrest warrant that had already been issued by the Public Prosecution Service in Flensburg.
That arrest warrant came about because Brückner did not comply with the terms of his probation. It entered into effect on August 31, 2018 after his release from prison. He had been detained there for a year and three months for child abuse and possession of child











. Instead of reporting to his probation officer at least once a month, the German left for Italy via the Netherlands. In addition, he still had a 2011 and nine months' imprisonment for drug trafficking.
Because the German police already suspected in 2018 that he might have something to do with the disappearance of Maddie McCann and were considered 'very dangerous', the Braunschweig detective arranged for him to be observed 24 hours a day. This was done by local police officers and colleagues from the federal police.
Games
Brückner would soon have noticed that he was being watched. “He started playing games with us. For example, got on a tram and got off again shortly afterwards, '' the regional newspaper quoted one of the members of the observation team at the time. The detectives soon had enough of his games and told the suspect: "You will not lose us."
The multiple convicted sex offender is said to have reacted angrily but eventually resigned himself to the situation. The investigators even made arrangements with Brückner. "I said to him: we can make things easier for ourselves. Let us know where you want to go. For example, we brought it to the health insurer or to the city center. ''