[7] He and his father were sent to Sachsenhausen concentration camp without undertaking any trial proceedings, while his brother managed to escape and move to Moscow.

Marta was sent to Moringen concentration camp where she remained until June 1937, when she was released, after being seen by Heinrich Himmler who thought she looked too Aryan.

[2] Through Marta his wife, who had worked with Gunther Weisenborn, he was introduced into a resistance group around Harro Schulze-Boysen and Arvid Harnack.

[10] Husemann through contact with fellow KPD member Wilhelm Guddorf,[11] became involved in writing articles for the magazine.

[13] Husemann was sent for trial by the 2nd Senate of the Reichskriegsgericht, who announced on 26 January 1943 a sentence of death for "preparation for high treason" and "aiding and abetting espionage".