Do you have proof that would stand up in court that she wasn’t?
I don't have proof that "would stand up in court" that a giant asteroid isn't about to hit and end all life on earth tomorrow afternoon either, but if someone makes that claim I think the onus is on them to at least provide some real evidence.
Offering the "oh my favorite politician must have been threatened" as an explanation for why someone didn't run for office is an old joke at this point. It's even less believable than the laughable, "I resigned from office to spend more time with my family" line commonly uttered by politicians caught in corruption scandals.
Come on now, lets stick to reality and avoid drifting off into fantasy land. Can we stop with conspiracy theories as explanations for why things we don't like happen in life.