[_kbh_]

And herein lies the problem, anyone who actually knows who it is, is not going to tell you how they know. The intelligence that was used to discover who the attacker, is much more valuable than the information of who the attacker is. The best you'd probably get is 'classified sources/methods/intelligence'.

[jjk166]

And anyone who doesn't know can give you just as much information. If you don't substantiate the rumor, it remains an unsubstantiated rumor.