The newcomers in Slough had stayed for a couple of days and they were starting to settle down. Killer, along with his father Earny, had pretty much made their decision that they would be staying here.
The place was far better than the last area they were in, and for Killer, the most he would be losing was his friends, with whom he didn't feel very close. Outside of school, he would only hang around with the other gang members, trying to get a position in a lower division gang of the Scavengers. Going back wasn't an option, and he didn't want to go back when staying in a city like this.
As for Herbert, the leader of the small gang that was in charge of recruiting the kids, he too knew that there was no going back. Finding out that the Scavengers were being run by a stronger corporation, they would wring him dry, asking for information about the Howlers, and even if he gave it, he felt like his life was still on the line.