http://www.coindesk.com/fbi-concerned-about-criminal-use-of-private-cryptocurrency-monero/The privacy-focused digital currency monero has captured the attention of the Federal Bureau of Investigation (FBI), which has expressed concerns over its use among criminals.
and so it begins...
Following the event, the special agent said he couldn't provide additional details specifically pertaining to the FBIs investigative techniques surrounding monero when asked by CoinDesk.
oh boy

Edit : sorry AzzAz, i overlooked your post on previous page