It's convoluted because they needed a parallel investigation to use in court.
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Use illegal means you don't want to admit in court.
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Locate suspect
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Manufacture a plausible excuse that suspect was found.
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Use that in court
It's not a hypothetical, it's fucking procedure
https://en.wikipedia.org/wiki/Parallel_construction
No one knows everything, I'd encourage you to ask questions next time.
Quick edit:
That's actually the second time in a row you did that, if I stop replying, it's because I gave up on helping you and won't see anymore replies in the future