I think the fact that this suspect is still alive is quite astonishing, particularly after the barrage of gunfire, over 100s of rounds of bullets spent reportedly by LE. And now you're saying he didn't even have a bullet-proof vest on! Wow. Just wow.
I hope LE interrogates him thoroughly and uses compassion rather than anger to garner the valuable info he holds -- he and his brother's motives, their terrorist training/techniques of bomb-making, which extremist cells they're affiliated with, if any, etc. The boy's young and his mindset is likely not immalleable, and you can catch more flies with honey than with vinegar. His not committing suicide by self or cop means he wants to live. I think deep inside, he wanted to be caught to face consequences and just punishment.