There, she worked on several political cases. These are cases in which, according to Böhler, the case "is about more than the hearing the trial of a crime, where political aspect, the history and the motivation of the client matter. Böhler defended Kurdistan Workers' Party (PKK) leader Abdullah Öcalan in 1999, during which's defense she was described by the Turkish authorities as a PKK militant. She also defended Volkert van der Graaf, the murderer of Pim Fortuyn, since 2002 and represented people who did not want Jorge Zorreguieta to attend the marriage of his daughter Máxima Zorreguieta and crown prince Willem-Alexander. In 2005 she defended Samir Azzouz, member of the Hofstadgroep. She also was legal counsel for Ayaan Hirsi Ali during the crisis about her nationality.