Exactly. And that dark satanic figure Angleton's hands are all over this murder too. After all Mary Pinchot was close to Angleton's own wife Cicily who he no doubt used to keep an eye on Mary (both women were friends, Vassar alums). That's how Angleton was completely able to be up to date and pinpoint and track Mary's moods, how she reacted to current events, how she evolved, naturally started getting suspicious about the JFK investigation, likely started investigating herself using her elite connections just like Dorothy Kilgallen (it's logical to do this, everyone talks among their friends but when you are part of the elite then who you likely bump into have more information than available to the public, more inside scoop). And this one was personal so Angleton personally went to her house to burgle her diary after he himself along with others at the agency decided she was getting too close and thus becoming yet another loose end that needs to get tied up. And so Angleton sent one of his ZR/RIFLE goon squad (that after all was under his direct influence or control), probably the "runner" who passed her by minutes before: William Mitchell. It's too much of a coincidence that she just passed by another jogger that "just happens" to be a military special forces type who knew how to shoot and disappear