It would have been very easy to leave it as an unidentified German national, but that wouldn't have served his purpose, which I believe was to scupper any chance that Brueckner might have had of being paroled by partially Identifying him and letting the Tabloids do the rest.
Amaral raised the issue in a podcast in 2019. Amaral then raised the issue once more in a television interview in 2020.
In both interviews he was at pains to finger a German paedophile serving time in a German jail. There was a choice of two but he helpfully indicated which one it was not ~ the press did the rest.
Who identified that the prime suspect was a patsy in a German jail? Why did he interfere in the German case with false information? That no doubt is for him to know and others to wonder about his purpose if they so wish..
Interesting though that he has started to withdraw some of his assertions in his latest TV outing though.
I firmly believe that without Amaral's intervention we might not yet have heard the name Brueckner while the Germans tightened up their investigation.