Peter Brown actually wasn't a meddlesome person. Seeing that the girl had been rescued and that the middle-aged woman claimed to be her mother, he didn't want to pursue the case any further and decided not to get involved.
Peter had changed his mindset after killing so many people, realizing that the world was a place where the weak were prey to the strong. Could he handle that many things on his own?
The police never questioned whether the woman was the girl's mother, and since it was their family matter, Peter intervening would only cause more trouble for himself.
Peter already had plenty of troubles and didn't want to get involved in this one. Although he could see that the young man named Jack Carter was a bad person, what could he do about it? The girl's family didn't want to press charges, and Peter didn't want to interfere in the case.
