As the trial of Rakhmat Akilov entered its second week, prosecutors questioned him over his motive and preparations for the April 7th attack.
When asked why he thought it wasn't a successful attack, Akilov replied: "Because I survived."
The 40-year-old Akilov told the courtroom that he began planning his attack on the busy shopping street of Drottninggatan in mid-March. And that he sought permission from members of the Islamic State via chat apps on his mobile phone.
Akilov, who spoke matter-of-factly in a low, muted voice even when discussing how he wanted to die a martyr in the attack, also testified that he chose Drottninggatan to cause maximum damage against Sweden.
"It is a central street in Sweden," he said. "It will remind them that all the evil they have done will not be forgiven by the caliphate."
Akilov said that he wanted to pressure Sweden's government to end its support of a coalition fighting the Islamic State group and avenge its killed members.
Akilov will be questioned again on Wednesday. His trial is scheduled to last through early May, with a verdict due in June.