So I'm gathering that this whole pile of crap is supposed to be based on a 'Recovered suppressed memory' brought out in her therapy, which is supposed to be why she didn't say squat about it at all for 25 years or so. And that she passed a contracted polygraph on it is supposed to matter.
First, that 'Recovered memory' stuff is useless garbage unless there is some physical evidence to show it isn't. The human mind can fill in all the blanks, including the entire plot of the story, when a psych starts dredging for shit, it may be all or partly real, it may be remembered pieces of dream or unrelated assembled to complete the story the therapist is demanding, and if only part of it is fact-based the mind is great at making up or assembling stray bits to tell the tale until the examiner is happy. Once the whole thing gels in the mind, the mind accepts it as fact, whether it really happened, or really happened 'As recovered' (Or at all) or not. And this BS is brought to you by the same forensic psychiatric community that will line up to testify that eye-witness identification based on current memory isn't worth squat (For an expert witness fee, of course).
Second, polygraphs:
A. They're useless for determining objective facts. Even under the best circumstances, all they do is determine whether the examinee is being intentionally deceptive if the examinee has typical stress reactions. They don't work at all on people who just have the facts wrong, are good liars, are crazy, or believe what they're saying.
B. The value of a poly is as an interrogation tool. The exam itself is only about ten or twelve questions, a third are calibration questions about objecive facts like birthdate and name, to get a 'Truth' baseline reading. A third are unimportant odd crap just to try to break up any attempt to fox the exam by staying tense through the whole thing. Only a third - three or four questions - are the 'Relevant' questions. The entire process only works if there are some hours of skeptical interrogation beforehand to wear down any plan of deception and bring the stress to a crescendo. After that, its real value comes in hours of interrogation afterwards, when the interrogator uses the poly results to work on any chinks in the story. Even with all those conditions being met, it isn't reliable as evidence, because some people can still fox it, and it still doesn't prove any objective facts, just the examinee's beliefs (At best). Used that way, it's great for busting a suspect's BS story and getting them to cough up the real one, but that's about it.
C. Contracted polys or 'Friendly' ones, aren't adverse and don't involve the hours of prep or follow-up interrogation. They're usually done by retired poly examiners from law enforcement agencies (ed, State, or local). They examiners aren't dishonest, but they'll be the first to admit that someone paying for 15 minutes of exam and a written report is not getting anything like the same conditions as a 'Person of interest' in a custodial interrogation, partly because an adverse atmosphere is part of what cranks up the stress in a real police poly exam. They won't quite admit the friendly exams mean practically nothing, because that wouldn't put any money in the bank, but you can tell they know that full well.
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I have close to zero faith in contracted polys, people beat them all the time. I have even less faith in 'Recovered memories,' unless there is some actual physical evidence to back them up, they are more likely to be the brain doing creative storytelling than to be factual.