The FBI must provide details on the network investigative technique used to hack more than 1000 computers in a case involving child pornography. A judge ordered the FBI to provide all the code used to de-anonymize Tor users. The FBI used only one warrant to hack computers of unknown suspects all over the world. The defense argues that the FBI left the child pornography site running in order to be able to do the hacking. In 2012, a case called Operation Torpedo the FBI disclosed the details a Metasploit module used for their investigation.”]
Source: http://securityaffairs.co/wordpress/44687/cyber-crime/fbi-network-investigative-technique.html