Arras attack: placed in a shelter, the attacker's little sister risks being forcibly “exfiltrated” by her father. The youngest daughter of the Mogouchkov family, little sister of Mohammed, the main suspect in the Arras attack, is the subject of an order prohibiting her from leaving French territory.
The ASE would also have noticed "the presence of a man near" the home where the little girl is placed, raising fears of "an exfiltration from the territory, possibly by force, under the instigation of the father"