In Norway, the trial of self-confessed mass killer Anders Breivik is entering its closing stages. It could end as early as next week. Breivik has admitted that he killed 77 people in two incidents last July. One was a bombing in Oslo and the other, a shooting rampage at a youth camp on the Norwegian island of Utoya.

But the central issue at the trial is whether Breivik is sane. The experts just can’t agree. And that leaves a big question mark looming over the trial’s outcome.

Anchor Lisa Mullins talks to Per Egil Hegge, a journalist with the Norwegian newspaper Aftenposten, to get more details.