The 30-year-old was arrested this week shortly after landing at Oslo’s Gardermoen airport after a two-month stay in The Philippines.
Helge Ove Irgens, 61, was found dead at his house in Sotra, outside Bergen on 25 June last year. Police initially concluded that he had died of natural causes, and it was only after they carried out an autopsy, under pressure from his two daughters, that evidence of carbon monoxide poisoning was discovered.
According to Norway’s VG newspaper, a police analysis of the woman’s computer later revealed that someone had used it to research different murder methods.
Inger-Lise Hoyland from Hordaland Police told VG that police had yet to ascertain the source of the carbon monoxide.
“There are signs that there has been fire in the bedroom, but we can not say anything more,” she said.
Irgen’s daughters told VG that it had been them, not police who had first spotted the signs of fire damage.
Regina (23), told the newspaper she had had to call police three times before they did anything about it.