Henri McPhee
Illuminator
Carol White had the right idea in that 1989 internet article about the MacDonald case:
Perhaps there was more to the story than Stoeckley knew
or wished to tell. It is possible that higher-ups in the operation
feared that Dr. MacDonald was in a position to inform on
them. In any event, after the murder, a coverup would have
been in their interest, and that is precisely what occurred. It
would appear that the Justice Department was fully cooperative
in this.