<p>In 1982, documentarian Nina Gladitz examined Reifenstahl's use of ethnic Roma concentration camp inmates as extras in a feature film, actions which demonstrated her knowledge of and complicity in atrocities. It cost her dearly, professionally and personally, over a decades-long pursuit of the truth. </p>
<strong>The long read</strong>: Nina Gladitz dedicated her life to proving beyond doubt the Triumph of the Will director’s complicity with the horrors of Nazism. In the end, she did it – but at a cost