Alldén admitted to killing Stenvall last September but claimed it was an accident. The Gällivare District Court sentenced him to life in prison for the crime in March this year.
Stenvall disappeared on September 12th, 2008 on her way to a job interview near Kiruna.
Her abandoned car was found the following day at a roadside rest stop about ten kilometres south of Gällivare.
Alldén was taken in for questioning on October 16th on suspicions of having murdered the missing woman.
Police discovered traces of Stenvall’s blood on the floor mat of Alldén’s car.
He later admitted to causing the 29-year-old’s death, claiming it took place at the rest stop following an argument over Alldén’s driving.
He explained that he pushed Stenvall, who then hit her head on the towing apparatus attached to Alldén’s trainer and died.
But an autopsy report indicated Stenvall’s death had been caused by gunshot fired at her back, rather than the fall.