Yeah, this is a lone example case and can't statistically prove anything one way or another. If what his mom was telling was even close to the truth, it does suggest he at least tried, a little, to stay out of it, but in the end didn't possess the willpower or a strong enough external stimulus to override his own lack of willpower. But then again, he might also have been simply too stupid and naive; maybe he went there to tell the gang he wants out - and was let out, in the most permanent fashion.