Most of the perpetrators of Nazi war crimes were never charged, and returned unremarked to civilian life. The West German Central Prosecution Office of Nazi War Criminals only charged about a hundred former "Einsatzgruppe" members with war crimes. And as time went on, it became more difficult to obtain prosecutions; witnesses grew older and were less likely to be able to offer valuable testimony. Funding for trials was inadequate, and the governments of Austria and Germany became less interested in obtaining convictions for wartime events, preferring to forget the Nazi past.