Not the person you responded to, however: https://www.bostonmagazine.com/news/2017/04/09/tamerlan-tsarnaev-fbi-informant/ https://www.bostonmagazine.com/news/2

Not the person you responded to, however: https://www.bostonmagazine.com/news/2017/04/09/tamerlan-tsarnaev-fbi-informant/ https://www.bostonmagazine.com/news/2017/04/09/tamerlan-tsar... It shouldn't be surprising to find that bad people sometimes turn out to be under the observation of, or even interacting with, law enforcement.