After the arrest of six key members of Lulz Security (LulzSec) thanks to the alleged help of the team’s leader Hector “Sabu” Monsegur, the Internet group Anonymous has decided to respond by hacking another security firm to post its open letter to the man who betrayed the hacker community.

(Reuters) – Even as he urged tens of thousands of Twitter followers to rise up and attack government and law enforcement, the most wanted hacker on the planet was working for the FBI. New Yorker Hector Xavier Monsegur, 28, was exposed on Tuesday as the person behind Sabu, the colorful leader of Lulz Security, a much-feared and talented offshoot of the cyber-activist group Anonymous