It is very likely he was informed on. (Grassed / Snitched)
One of the better broadsheet newspapers here in the UK had an article on Lulzsec/Anonymous, and one of the best comments they made was:
"Hackers fear other hackers more than law enforcement."
In this community it seems there is no honour amongst thieves. I very much suspect they grabbed a bunch of people around the world who were less talented at hiding themselves, and one of them knew enough to plea bargain in return for information.
One of the better broadsheet newspapers here in the UK had an article on Lulzsec/Anonymous, and one of the best comments they made was:
"Hackers fear other hackers more than law enforcement."
In this community it seems there is no honour amongst thieves. I very much suspect they grabbed a bunch of people around the world who were less talented at hiding themselves, and one of them knew enough to plea bargain in return for information.