A few years later, I was taking a criminal justice class at a nearby community college, and the term project involved working with local law enforcement to understand criminal activity. When we got to talking about gang activity, I realized I already knew a lot about what the sergeant was saying, and I remembered that encounter I had years ago with my brother. I mentioned it to the sergeant, and he told me about pee wee gangsters and how they have been an increasing problem recently.
I'd forgotten about all of that until just now, and I hadn't realized how disturbed it all had made me feel back then.
To my knowledge, it was fortunately "just a phase" and they're now more or less normal, functioning suburbanites with mediocre desk jobs.