The child is scared beyond belief. He can't read the writing on the wall and he knows the man is under his bed. Like any child, he pretends that he slept through the whole thing and hasn't awoken yet. He lays still as the bodies, quietly hearing the breathes from under his bed.
An hour passes, and his eyes are adjusting more and more to the darkness. He tries to make out the words, but it's a struggle. He gasps when he finally makes out the sentence.
"I know you're awake". He feels something shift underneath his bed.