When his re-election in 1975 seemed unsure, Kreisky proposed that his Social Democratic Party should form a coalition with the Freedom Party, headed by Friedrich Peter. Wiesenthal had documents proving that Peter had been a member of the 1 SS Infantry Brigade, a unit that had exterminated over 13,000 Jewish civilians in Ukraine in 1941–42. He decided not to reveal this information to the press until after the election, but forwarded his dossier to President Rudolf Kirchschläger. Peter denied having participated in, or having knowledge of, any atrocities. In the end, Kreisky's party won a clear majority and did not form the coalition.