Interesting question.
It is possible she was able to keep her story hidden until such time that she could be reasonably assured of her safety when she brought her knowledge to light. I submit that time is now. There is sufficient doubt of the official story in the minds of the populace to support her claims. If she were to, have an accident now, it would undoubtedly be very suspicious. I would however, advise her to inform the public that she has no intention of suicide.