What tragic event did Hitler use as an excuse for the immediate cessation of civil liberties and establishment of a Nazi dictatorship as noted in the biography, Adolf Hitler?

The Reichstag Fire is a fire that burns down the Reichstag building in February 1933. It is said to be started by a Dutch madman named van der Lubbe. Van der Lubbe is found at the site of the fire, but many observers blame the fire on the Nazis, since it is seen to start rapidly and may have been set by many people. The fire burns down the Reichstag, the Parliament, and is blamed by Hitler on the Communist. This is the excuse for the immediate cessation of civil liberties and establishment of a Nazi dictatorship.