sentences:  The gold in 1966 was awarded following a crash that killed his fellow athlete Toni Pensperger during the four-man event.Pensperger was posthumously awarded the gold medal while Siebert and his surviving teammates Helmut Werzer and Roland Ebert received their golds as well.Siebert also finished fifth in the four-man event at the 1964 Winter Olympics in Innsbruck.