▁purchase ▁potentially ▁to ▁an ▁American ▁fle a ▁market ▁in ▁the ▁ 1 9 6 0 s . ▁ ▁Philip ▁Ol ter mann ▁wrote ▁in ▁The ▁Guardian ▁that ▁the ▁documents ▁failed ▁to ▁generate ▁much ▁interest ▁because ▁of ▁the ▁f aked ▁Hitler ▁Di aries . ▁ ▁However , ▁H imm el ' s ▁documents ▁were ▁later ▁authentic ated ▁by ▁the ▁German ▁Federal ▁Archives . ▁ ▁In ▁ 2 0 0 6 , ▁L apa ' s ▁parents ▁purchased ▁the ▁later ▁documents ▁with ▁the ▁intention ▁of ▁having ▁their ▁daughter ▁create ▁a ▁document ary ▁based ▁on ▁them . ▁ ▁L apa ▁said ▁that ▁her ▁generation ▁was ▁the ▁first ▁one ▁far ▁removed ▁enough ▁from ▁the ▁Hol oca ust ▁to ▁be ▁able ▁to ▁make ▁the ▁film . ▁ ▁Release ▁ ▁The ▁Dec ent ▁One ▁premier ed ▁at ▁the ▁Berlin ▁International ▁Film ▁Festival . ▁ ▁L apa , ▁her ▁parents , ▁and ▁her ▁grand par ents ▁attended ▁the ▁premi ere ; ▁K atr in ▁Him ml er ▁also ▁appeared ▁and ▁discussed ▁her ▁great - un cle . ▁▁ ▁Tim ed ▁with ▁the ▁release ▁of ▁the ▁film , ▁ ▁the ▁German ▁newspaper ▁Die ▁Welt ▁controvers ial ly ▁published ▁several ▁of ▁the ▁documents ▁to ▁accus ations ▁of ▁sens ational ism . ▁ ▁Also ▁tim ed ▁with ▁the ▁release ▁of ▁the ▁film , ▁K atr in ▁Him ml er ▁co - w rote ▁a ▁book , ▁Him ml er ▁Priv at . ▁ ▁K ino ▁Lor ber ▁released ▁the ▁film ▁in ▁the ▁United ▁States ▁on ▁October ▁ 1 , ▁ 2 0 1