The man was remanded in custody later on Monday, ordered held on suspicions of murder.
However, the man has only confessed to involuntary manslaughter.
“He confessed that he killed her at the Stenbron rest area, then put her in the car,” said the man’s lawer, Leif Gustafsson, to the Expressen newspaper.
But the man still hasn’t told police where Stenvall’s body is.
According to Expressen, the man told police during questioning that he had “chaos in his brain”.
“He doesn’t remember where he was except for a few short fragments, but he knows that he got rid of the body the same day, even if he can’t remember exactly what he did with her,” said Gustafsson.
The man met Stenvall by chance as he stopped at a rest area just off the E10 motorway near a stone bridge southeast of Gällivare to throw out some garbage, he explained to police.
But Gustafsson wasn’t willing to say why the his client took Stenvall’s life.
The suspect was out on a hunting trip when Stenvall disappeared on September 12th. She was on her way from Piteå to Kiruna for a job interview.
The following day she was reported missing.
Police have found traces of Stenvall’s blood at the rest area, as well as in the suspect’s car and on a floor mat found at the same rest area.
The mat belongs to a car of the same make as the 50-year-old’s.
He also has a summer cabin in a village near the Stonebridge rest area.