Following a trial that was prominently covered in the German press due to its illustrious protagonists, particularly the heirs of billionaire Berthold Albrecht, one of the founders of the German discount supermarket chain Aldi, German art consultant Helge Achenbach was found guilty of fraud by the District Court in Essen and sentenced to six years in prison on Monday.

The 62- year old used to be one of Germany’s most influential art consultants, entertaining long-term business relationships with some of the country’s wealthiest collectors. Berthold Albrecht, who passed in 2012, was one of his most important clients. Achenbach had repeatedly inflated the net purchase prices for art works and vintage cars he procured for Albrecht and other clients.