Scharmer said the verdict against Hanning is not legally binding as appeals were still pending at Germany's highest court.
“If action isn’t taken, it could mean that this individual may never face any form of justice.”
A preliminary report into the inspection of all barracks is due on Tuesday. With the final results on May 16.
The long and narrow plaque is part of a collection of identical ones placed along a stretch of some 13 blocks on Broadway also known as the “Canyon of Heroes”.
According to the organizers of the protest, Palij entered the US in 1949 claiming he was a farmer during the war.
Despite the knowledge, the Allies did little to help stop the massacre at the hands of the Nazi regime.
Around 5000 men who were convicted of homosexuality during the Nazi-era are still alive today.
Local NBC news affiliate said Fiorito had made a similar billboard in 2004 with former President George W.Bush and other top US officials.
German doctor Josef Mengele drowned in Brazil in 1979, after he spent years on the run from Mossad agents.