Sen. Charles Grassley (R-Iowa) has sent a letter to FBI Director James Comey asking for more specific information about the FBI s current use of spyware The letter is related to a current effort by the Department of Justice to get more leeway in the way that its agencies use spyware tools in criminal investigations. Grassley also is seeking information about whether and how the FBI uses zero days in the process of installing spyware on target machines, and if so, whether the FBI develops exploits in-house or buys them from vendors such as VUPEN.
Source: https://threatpost.com/senator-demands-answers-on-fbis-use-of-zero-days-phishing/113593/