The now 15-year-old allegedly broke into the LTU Arena with a friend and opened three taps in the VIP seating area in October 2006, when he was just 13-years-old.
Some 1,400 litres of pilsner soaked through several layers of the stadium and through a conference room until it reached the parking garage, causing extensive damage, LTU Arena spokesperson Rainer Schüler told The Local on Monday.
"The stench was overwhelming and it took a year before we were able to use the conference room again," Schüler said, adding that the boys were easily found thanks to clear images on surveillance videos.
Only one of the boys faces charges of property damage and breaking and entering, because his friend was not yet of the age of criminal responsibility when the crime occurred.
The arena's insurance provider has long since covered the costs of the vandalism and is now pursuing damage compensation at court, Schüler said.