According to her plan all the group leader were tied to the chairs and kept in separate rooms but now the next part was their interrogation which she had to do by herself to get as much information as she could about their main leader who actually did the worse with the females. Kevin made sure that each of them was unconscious until Rachel was fine and ready to do her job.
Around 12 at night Rachel gained her consciousness. As it was late and they had school the next day Kevin asked her to sleep and deal with that later but she got out of the bed "No, we can't delay this even by a single day or their main leader will notice that something is wrong, let's follow the original plan.
Kevin had no choice but to agree as she was stubborn so one by one she interrogated everyone by torturing them and got the exact location of their leader within half an hour until then Kevin found out that the person who was closest to the leader was the one they had caught.