That was my own interpretation... but admittedly maybe too strong of a statement. Maybe she would have be caught. That said, the psychological setup in those periodic interviews with a "maybe lie detecting machine" create opportunity to find real issues.
In terms of the details here, the leak wasn't to expose the crimes, it was to resist political pressure [my speculation anyways]. The crimes were being investigated anyways and the video was available internally fairly broadly (and I think maybe externally as well). There was a political storm as a result of the investigation and the arrests made. Apparently leaking the video is was not illegal (though that's subject to some interpretations) because the role of the chief prosecutor is independent but this became more complicated when it required lying to the supreme court to cover the leak.
But yeah, it's possible the Shin Bet already had an idea but just used the polygraph as an excuse/opportunity. While it's understandable in the political climate why the chief prosecutor would leak the video it's also unethical and poor judgement for someone in her role to do so, and then to cover it up. The role of the Shin Bet is to find people in sensitive roles who are secretly doing things they should not be doing (typically spies but more generally people betraying the trust put in them). For those not following, the plot got thicker because she proceeded to throw her iPhone in the Mediterranean and it was found by a swimmer some days later. She also tried to harm herself. It's pretty crazy stuff. Now there are arguments about who should oversee the investigation with the supreme court set to decide today. It's a pretty small/tight legal community and everyone knows everyone, especially at the top. The legal system has been in a battle with the government for some while with the justice minister refusing to accept the last appointment of the chief justice of the supreme court.
Anyways, the polygraph angle is interesting. That this machine survives as a practice in many places tells us something about its usefulness (or at least people's belief in its usefulness).
About a decade ago, "magic wand" bomb detectors and similar products were pretty big among security services in places like Iraq. [1] Their various supposed methods of operation were transparent BS, in ways that make the EM drive proponents look rigorous.
What always struck me about reporting on them was how there was a great deal of coverage about how fraudulent they were, but seeming puzzlement on why security services would keep buying such obvious BS. What seemed clear to me, was that the BS was the point. Similar to polygraphs and drug-sniffing dogs, the purpose of the tool is to give the investigator a seemingly-objective excuse to follow their intuition (or engage in arbitrary targeting and abuse; take your pick).
I was once in an airport in some third world country and one of those dogs was pointed at my luggage. I was really worried their operator would give them some secret signal to find "drugs" in my luggage. Nothing happened but I can imagine that's a thing.
Those wands were completely fake. Dogs do have a keen sense of smell and can be trained to sniff certain substances.
The polygraph I think is more in the disputed category. It actually measures some physiological signals which in theory could correlate to stress.
That said I don't disagree. These tools can be abused. At the end of the day you need various checks and balances in all these systems (e.g. FBI's internal investigation or whatever body is involved in the security clearances in the US in this example). Applying psychological pressure in various ways is a legitimate tool in these domains.
In terms of the details here, the leak wasn't to expose the crimes, it was to resist political pressure [my speculation anyways]. The crimes were being investigated anyways and the video was available internally fairly broadly (and I think maybe externally as well). There was a political storm as a result of the investigation and the arrests made. Apparently leaking the video is was not illegal (though that's subject to some interpretations) because the role of the chief prosecutor is independent but this became more complicated when it required lying to the supreme court to cover the leak.
But yeah, it's possible the Shin Bet already had an idea but just used the polygraph as an excuse/opportunity. While it's understandable in the political climate why the chief prosecutor would leak the video it's also unethical and poor judgement for someone in her role to do so, and then to cover it up. The role of the Shin Bet is to find people in sensitive roles who are secretly doing things they should not be doing (typically spies but more generally people betraying the trust put in them). For those not following, the plot got thicker because she proceeded to throw her iPhone in the Mediterranean and it was found by a swimmer some days later. She also tried to harm herself. It's pretty crazy stuff. Now there are arguments about who should oversee the investigation with the supreme court set to decide today. It's a pretty small/tight legal community and everyone knows everyone, especially at the top. The legal system has been in a battle with the government for some while with the justice minister refusing to accept the last appointment of the chief justice of the supreme court.
Anyways, the polygraph angle is interesting. That this machine survives as a practice in many places tells us something about its usefulness (or at least people's belief in its usefulness).