The use of private investigators has exploded in recent years. Desperate families, suspicious spouses and employers looking for unfaithful servants spend thousands of kroner to reveal the truth. In tonight's Insider, we have been with three private investigators at work.

There are major changes in the Norwegian police, and the patrols on the streets face a new and more brutal crime scene than just a few years ago. At the same time, both the terrorist act on 22 July and the triple murders in Årdal showed that preparedness in the districts is lacking. During the most demanding missions, all police districts have specially trained emergency units that deal with the situation. Insider has been allowed to follow one of these local units as they prepare for armed actions and terrorist attacks in their district.