This study analyses the demographics, criminality, and network relations of 41 deceased Swedish foreign fighters. Our results show that most of the deceased Swedish foreign fighters were on average just under 26 years old when they died. Concerning network relations, 19 out of the 41 foreign fighters had at least one relationship (next-of-kin or friend) with another deceased foreign fighter. Two-thirds were previously suspected of at least one crime. Based on our results, we argue that more attention needs to be given to tertiary and secondary prevention directed toward foreign fighter hubs.