I'm curious, does a police chief have any power they can exercise arbitrarily?

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Since there are higher authorities like Provincial Police Agency Commissioners and the Commissioner General of the National Police Agency anyway,
is there really anything a mere local police chief in charge of a single district can do on their own?
Besides, in this era where CCTV and social media are so advanced,
it seems difficult for them to abuse their power recklessly like a local magistrate from the old days.