As soon as Levi sent the assistant back with the old doctor, he overheard the healer and the doctor begin questioning the assistant about what had happened. With Levi's permission to speak openly, the assistant recounted everything honestly. His detailed explanation made both the old doctor and the healer exchange a grave look—they realized the situation was even more serious than they had initially thought.
The fact that Levi had already interrogated the assistant signaled that he was aware of far more than he was letting on. It became clear to them that they didn't need to investigate further or poke around for information. All they had to do now was stay in their lane and avoid getting involved—any interference on their part could make matters worse.