[user104658]

Being in a position of power to do this for long enough to do it 24 times is absolutely insane... there's no way that people didn't know it was happening. And I mean people in a position to do something about it. There will at the very least have been rumours.

You have to suspect that they either weren't that bothered, which would suggest major issues with a culture of police officers abusing positions of power, or perhaps more likely that there's some sort of red tape in place that means people's hands are tied until there's a formal investigation.