As for series on related topic, I am able to recall Varg Veum, and apparently I have seen all episodes available... Yes, I liked it, but it is more Beck and Wallander than those coming from Scandinavia when you have to watch all in sequence and where are many intertwined events, not every episode dedicated to solving a certain tort or felony.
Øyevitne measures easily up to the currently most famous Danish-Swedish series: gloomy atmosphere, harsh nature, thrilling yet realistic plot with some unexpected changes, fitting actors performing rather as a team than backing someone who is heavily "better" or "distinct" (Axel Bøyum and Anneke von der Lippe had apparently the most versatile characters to play)... Some spend more time on screen, the others less, but they do all have their role and place, not just filling a scene or prolonging the events (6 episodes made the story intense and compact). Plus, I liked the ending as the very final scenes did not contain the odd dramatics so characteristic to the US series, above all. And I also liked that private and sensitive issues were approached in realistic manner, as a part of everyday life, without strict assessments.
I am pleased that Norwegians have vigorously established themselves in the field long dominated by Swedes and Danes. Well done and more similar achievements in the future!