The Australian Federal Police allege the woman travelled to Syria in 2015 to join her husband, who had earlier left Australia and joined Islamic State (ISIS).
For the families of those killed, the evidence raises another painful question in a case already marked by grief, anger and a long search for accountability.
Websites associated with AudiA6 and Dark2Web on both the clear web and dark web were replaced with law enforcement seizure notices as part of the operation.
