FBI used Hacking Team services to unmask Tor user

The FBI communicated with Hacking Team over the possible use of surveillance tools to track down a Tor-using target, emails reveal.
As discovered by Hacker News, the cache of emails belonging to Hacker Team but now hosted on Wikileaks reveals a number of interesting conversations allegedly between the FBI and surveillance company.
Hacking Team is a company which specializes in providing surveillance tools to law enforcement, government agencies and intelligence services across the globe. The firm's dealings were blown apart this month when a as-of-yet unknown hacker -- or team -- broke into Hacking Team's servers and made off with 400GB in corporate data. Spanning from customer lists to exploits and emails, much of the firm's data is now firmly entrenched within the public domain.