The FBI develops some hacking tools internally and purchases others from the private sector. With such technology, the bureau can remotely activate the microphones in phones running Google Inc.'s Android software to record conversations, one former U.S. official said. It can do the same to microphones in laptops without the user knowing, the person said. Google declined to comment.
It's said that bureau typically uses hacking for cases that involve organized crime, child pornography, or counterterrorism. Apparently, it tries not to use these tools when investigating hackers for fear that they will discover and publicize the technique.
More details in the full report linked below...