The man who killed 5 and injured 15 has already confessed, but in the case that starts today prosecutors will try to prove that what he did in April 2017 should be seen as terrorism.
In Stockholm's District Court media assembled to report on Sweden's biggest terrorism trial, as a 39-year-old from Uzbekistan is charged with terrorism.
The Drottninggatan terrorism suspect has arrived in the courtroom, wearing a green jumpsuit, green sweater, closely cropped hair and longish beard with no mustache. He was flanked by his defense attorney and interpreter.
For the court to find him guilty of terrorism rather than murder the prosecution must show the attack on Stockholm's Drottninggatan was about causing major damage to Sweden as a state. The suspect has claimed that he wanted to stop Sweden taking part in the training mission to support anti-IS fighters in Iraq.