After his release in summer 1936 , he went underground , working in the leadership of the Berlin KPD .
Uhrig was arrested by the Gestapo in 1934 and sentenced to hard labor at the Zuchthaus in Luckau .
After Uhrig 's release in summer 1936 , Uhrig went underground , working in the leadership of the Berlin KPD .
Uhrig was arrested by the Gestapo in 1934 and sentenced to hard labor at the Zuchthaus in Luckau .