I wish I could say this surprised me but I've said it before and I'll say it again. The police, no matter in what country, suffer from having a scarily high number of people who have been attracted to the profession because they are controlling, abusive, and love the feeling of having power and who absolutely abuse that in any way they can.
And those not actually doing it participate in the awful 'banter' around acts of abuse by police officers.
And those that don't behave that way rarely challenge it. (And those and their families are the ones that scream about how fantastic the police are in all things at all times and shut up everyone don't dare say anything about it or you're personally attacking us and want us to diiiiiiiiie 🙄)
And those few that do report and try to make a difference get turned on because they've broken some sort of code and find themselves turned on, abused, sacked while perpetrators are protected. Which makes those who would want to report not dare to.
And it's all because those in control do not want to accept or admit that police forces have a lot wrong with them and the culture is toxic.