Since the act on February 4 at Campus Risbergska, where ten people were murdered before Rickard Andersson took his own life, the police have held over 850 interrogations.
In addition, extensive film material with a total length of several years has been collected. Rickard Andersson's computer has also been examined by IT forensic experts.
However, the investigators have not found any motive for the massacre.
We have a better picture of him, but I cannot say that we have found a motive picture for this act in this picture, says Kristoffer Zickbauer to the radio.
He says that the investigation has not found anything that can suggest an extremist motive behind the act.
It is possible that the answers may not be found and then we must reconcile ourselves with that, he says to the radio.
He estimates that it may take several more months until the investigation is complete.
