"Yes. I paid Barty a visit and used his mark to kill them all. He wanted to bring Voldemort back and start a war," he kisses Sev’s bare arm, he had removed the mark almost a decade ago, "I didn’t want to fight a stupid war that is why I acted. Luna also told me he was the last threat to our peace." He knew Barty was out there but he did not move against him until Barty made a move, which he did when he started killing people.