Ingeborg Barz, a young secretary, joined the Baader-Meinhof Group in December of 1971 along with her politically active boyfriend Wolfgang Grundmann. After a few months on the run Barz called her mother on 21 February, saying that she wanted to come home. She was never seen again.

It has always been assumed that she was killed at the end of February 1972 because she wanted to leave the group. But her body's whereabouts were never properly determined. A body turned up in a forest outside of Munich in July of 1973, but it cannot conclusively be determined to be Barz's. Baader-Meinhof "traitor" Gerhard Müller later testified that Andreas Baader shot her, but his testimony was riddled with inconsistencies and questions therefore remained.