State of the Onion [31c3] by Jacob Applebaum & Arma:
https://www.youtube.com/watch?v=pRrFWwA-47U
At around 47:30
So what he's saying basically is that everything that was seized during Onymous was found using info that was extracted from computers of people that Blake named? (All the other sites etc...)
The relevant part:
"I actually talked to an American LE person who was involved in this and he told me from his perspective exactly how it happened. Apparently the Silk Road 2 guy wrote his name down somewhere. So, they brought him in and started asking him questions, and as soon as they started asking him questions he started naming names. They counted up to 16 names, and they went and arrested all those people and collected their computers, and then they put out a press release saying that they had an amazing tor attack."