I knew it was Gunnar Gunnarsson before I even clicked the link.

Can confirm this is the case, both TV and real life.

Source: Am Norwegian. My son murdured Gunnar Gunnarson shortly after this documentary was filmed.

Here is an alternative Piped link(s):

Every Single Scandinavian Crime Drama

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I’m open-source; check me out at GitHub.