As for why I imagine the CIA is testing this, the CIA has experimented on unwitting American citizens and servicemen with drugs and poisons in the past[1], so it's not outside their ken to do such a thing.
Perhaps the CIA is testing their new stealth harassment/assassination/mind reading tool and wants to test it on realistic targets but also not risk exposing the device to a hostile party. With US intelligence agencies perpetrating and investigating attacks on realistic targets, it may make a good test environment.
I'm not saying I believe it is the CIA, obviously I have no evidence and this is just speculation. I'm just saying I'd consider them as suspects.
1 - http://healthland.time.com/2012/03/23/the-legacy-of-the-cias...