Snape nodded tersely to the both of them, knowing perfectly well that nothing about this was over, and that he'd have a lot to thrash out, and soon, with both father and son.
"I'll see you later," he said, glance flicking between the two of them, keeping the exact target of the words ambiguous. He wasn't interested in searching for Sirius, so he looked around, and seeing that by now the Aurors had matters in hand, he Disapparated.