An Idealistic Cop, a Forbidden Ticket and a Police Career on the Brink
nytimes.com
nytimes.com
It's all part of a "I've got mine" culture that is comfortable with different sets of rules for different kinds of people. And it certainly fosters corruption, favors and deals done outside the normal channels.
This practice and anything like it should absolutely be outlawed and rooted out.
Policing as an institution enforces these norms on itself, which is part of what we mean by ACAB. Good people can become cops but they can't remain cops: they conform or are forced out.
There was kind of a locally-known-among-cyclists case in chicago a few years ago where a driver (police family member) did a bad left turn and hit someone in the bike lane. A cop witnessed it and wrote a failure to yield ticket to the cyclist. Luckily there were a ton of witnesses and it got picked up by a good lawyer who worked it hard. But still there were no particular consequences to the driver or the cop.