Whistleblower may be more than one person
A couple analysts on the news tonight think it may be as many as 5 or 6 interdepartmental persons who coordinated information about the call as well as the lead up and follow up of the call. As many as 12 people may have listen to the call when it happened (CIA, State Dept., etc) and there was immediate alarm and discussion between agencies. A number may have worked together to submit the complaint. The one point person may have just drawn the short straw. Interesting speculation.