Krayem's connection to IS began when he traveled to Syria in September 2014 to fight for the organization. Following the gruesome publication of a video of al-Kasasbeh's death, his home country of Jordan had been engaged in efforts to negotiate for the pilot's release amid a tense hostage crisis. The Swedish Prosecution Authority announced Krayem's charges last week, detailing that he was involved in the execution process, including forcibly placing the pilot in a cage which was then ignited, leading to the pilot's death.

Krayem, initially from Malmö, had previously been sentenced in June 2022 to 30 years in prison for his role in the 2015 Paris attacks, where 130 individuals died, along with a conviction related to a separate attack in Brussels that left 32 people dead. To enable his participation in this trial, he has been temporarily transferred from France to Sweden.