Per his LinkedIn[0] he started college at age 16. He's 23 now. The fact that he started college 2 years early, seven years ago, made him decide to DDoS a huge DNS provider? That's quite a leap...
"After starting college at the age of 12, I..." (from his crunchbase linked above)
I'm not a judge nor a jury, I'm not stating he is guilty, just that that's more likely that a random guy attacking the firm