Big Government has this on the Anonymous arrests:
As an influential member of Anonymous and two other splinter groups known as” LulzSec” and “Internet Feds,” Monsegur is alleged to have spearheaded multiple cyberattacks against various business and governments in the US and elsewhere in the world, according to the unsealed indictment.
[….]
Five other prominent hackers with LulzSec were also exposed by Monsegur.
From FOX News:
As a result of Monsegur’s cooperation, which was confirmed by numerous senior-level officials, the remaining top-ranking members of LulzSec were arrested or hit with additional charges Tuesday morning. The five charged in the LulzSec conspiracy indictment expected to be unsealed were identified by sources as: Ryan Ackroyd, aka “Kayla” and Jake Davis, aka “Topiary,” both of London; Darren Martyn, aka “pwnsauce” and Donncha O’Cearrbhail, aka “palladium,” both of Ireland; and Jeremy Hammond aka “Anarchaos,” of Chicago.
Hammond was arrested on access device fraud and hacking charges and is believed to have been the main person behind the devastating December hack on Stratfor, a private company that provides geopolitical analysis to governments and others. Millions of emails were stolen and then published on Wikileaks; credit card numbers and other confidential information were also stolen, law enforcement sources told FoxNews.com.
Hammond has reportedly been a fixture of the Chicago anarchist scene and is said to have been active with numerous left-leaning groups. He was previously sentenced to two years in prison for hacking into the website of a conservative group known as “Protest Warrior,” which organizes counterprotests to those of anti-war activists. He has also been arrested numerous times over the last nine years; the Chicago Tribune notes that those convictions range from disorderly conduct to computer hacking to felony mob action. The Tribune article details Hammond’s extensive background in “hacking to fight for social justice” and liberal activism. (Side note: the article also notes that Hammond’s mother is a Tea Party activist!).