The whole issue of private polygraphs confuses me, truthfully. Let's say that the answers aren't favorable to JR ... would the polygrapher be able to administer a second polygraph and not submit the first one? Is he/she allowed to keep such info private?
Yes. If your attorney sets up a private poly, it is protected by attorney-client privilege, preventing the results from being disclosed without consent.
If you google "private polygraph" you'll find a million companies that cater to defense lawyers for this purpose. Here's one that explains the poly from the lawyer-client perspective: http://www.tkjpolygraph.com/attorney.html
Note:
Polygraph examinations given by the government or a law enforcement agency are used to support prosecutorial efforts. In contrast, TKJ Polygraph, LLC examinations is confidential, attorney-client work product. Nothing about the examination, including the simple fact a test was administered occurs without your prior written permission. You are in control of the release of any and all information about the examination. All data collected from the examination, which includes audio/visual recording, polygraph charts and written information is released only upon a written directive from the attorney ... Utilizing a private polygraph examination prevents providing a prosecutor the opportunity to conduct discovery about your case directly from a client since you never know what question the prosecutor's examiner will ask during the examination or interviews.... TKJ Polygraph customizes Specific Issue polygraph examination around defense attorney's needs. This polygraph program will allow defense attorney’s to better defend their client or shape their defense strategy, either by putting pressure on the prosecution or by being ready for any circumstance during trial.