Even in foreign countries, prosecutors direct and conduct investigations.

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Even in communist countries, lol
Xi Jinping actually carried out a massive purge of the Chinese public security forces.
Even in North Korea, prosecutors conduct and direct investigations, lol
The leftists in the UK are using some kind of "British" style now,
but even in the UK, prosecutors direct investigations, lol
A time when the prosecution service was abolished
and prosecutors didn't exist at all?
That did happen during the Chinese Cultural Revolution.