"Of course Moody is after you. You've hardly been careful about concealing your involvement, have you?"
Severus's logic was icy, as usual. Still, Karkaroff managed a weak smile.
"Well, surely – surely you understand my reasoning, Severus? For going into hiding?"
"Oh, yes, I quite understand. Whether he will is debatable."
Karkaroff blanched. "Severus, you won't tell—"
"If you expect me to explain to the Dark Lord that you are putting your own safety ahead of his instructions, you are mistaken," Severus said coldly. "He will not protect you from the Aurors, but...flight risks his displeasure."
Karkaroff hid anyway.