We set up a randomised clinical intervention trial for the treatment of former offenders that covers violence perpetration on the one hand and traumatization on the other. 90 participants were chosen by the highest aggression scale scores and a certain threshold of trauma symptoms. 17 participants received FORNET, while 14 matched participants received CBT and another 7 matched participants treatment as usual (Waiting List camp) in a camp. Matching took place according to the severity of trauma symptomatology, aggressive behavior and suicidality. 36 participants didn't receive intervention and weren't part of the camp (Waiting List no camp) but were included in the follow-ups. In order to compare the treatment effect with the two control groups and follow the long-term effects, post-treatment assessments with the initial survey were performed about 8, 18 and 25 months post-treatment.