Hector Xavier Monsegur, better known as the hacker Sabu, has helped the US government with breaching numerous foreign websites, including ones belonging to various governments.
The New York Times has obtained copies of some unredacted court documents and has conducted interviews with people involved in the attacks coordinated by the US government through Sabu.
Monsegur was arrested in mid-2011. Ever since, he has worked with authorities on identifying hacktivists and conducting cyber o…