You picked a terrible example as a counterpoint, because ACAB is about police protecting bad police (or generally, authorities defending each other as a gang themselves).
Which is seen in every group of authorities around the country. They literally give out get out of jail free cards for cops’ friends and family in many parts of the country, that is systemic, and has nothing to do with frequency of cops committing crimes.
And when a cop tries to do something about it, this is the sort of thing that happens. This guy seems like he's trying to do the right thing, but the system is designed so he can't:
https://www.theguardian.com/us-news/2023/jun/04/nypd-lawsuit...
> Bianchi claims his superiors retaliated against him for his stance against the “corrupt” cards after he was warned by an official with the Police Benevolent Association, New York City’s largest police union, that he would not be protected by his union if he wrote tickets for people with cards. And if he continued, he’d be reassigned... The lawsuit cites several instances where his NYPD colleagues complained about his ticket-writing, including on Facebook...
> Bianchi’s service as a traffic cop ended last summer when he wrote a ticket to a friend of the NYPD’s highest-ranking uniformed officer, Chief Jeffrey Maddrey, the lawsuit states.
Adrian Schoolcraft is the name that comes to mind for me: https://en.wikipedia.org/wiki/Adrian_Schoolcraft
> Schoolcraft amassed a set of tapes which demonstrated corruption and abuse within New York City's 81st Police Precinct. The tapes include conversations related to the issues of arrest quotas and investigations. [...] Schoolcraft was harassed, particularly in 2009, after he began to voice his concerns within the precinct. He was told he needed to increase arrest numbers and received a bad evaluation.
His fellow officers had him involuntarily committed to a psychiatric ward. They told the hospital that his claims were a sign of paranoid delusions. He was eventually vindicated, but his career was destroyed.
It's been a long time since I heard this, but I believe there is recording here [0] of his colleagues forcing themselves into his apartment to have him committed.
[0]https://www.thisamericanlife.org/414/right-to-remain-silent/...
Also, watch Serpico. https://m.imdb.com/title/tt0070666/