Detective Inspector Carl-Johan Ekenblom and his colleagues have been instructed to go through all the abusive material that was seized in connection with the attack on Eskilstuna's apartment.

- There is over 1,000 hours of playing time on the filmed part of the material, and we can see over time that the holdings of such material have grown.

It is a form of collective behavior, says Carl-Johan Ekenbom.

The main focus is on identifying the perpetrators, children and places that appear in the abuse material.

It has already been possible to arrest another man, living in another region, who is now being investigated separately from the case in Eskilstuna.

Hear him talk about the work of the investigation in the clip above.