The building in Sollentuna, with six security halls, was completed in 2020. The idea is that all of Sweden's district courts will be able to use the halls in a flexible way as a kind of "hotel" for tough negotiations that require more space and also higher security.

- It is a national resource.

Today we have Växjö, Uppsala, Gävle and Solna visiting.

Three of the negotiations concern murder, and so is network-related crime, says security chief Lars-Gunnar Gustafsson.

In concrete terms, this means, among other things, that the detainees do not come close to the audience, as they are separated by a glass wall.

Follow into the hall in the clip above.