According to Rape Crisis, there are 618,000 reports of rape a year, so that's one per 108 head of population. There are 32,000 in the Met Police, but I've not seen over what period the compalints were made.
(Tangentially, I know someone who was raped, she said the police were very good with her, and it was Rape Crisis who were making her feel like it was her own fault.)
That depends whether they're watching it happen and turning a blind eye. In the case of the NHS there are those who
publically admit the lying and cover ups are endemic, so once people see that it's openly acknowledged and nothing gets done about it, that's a green light for murder. As an outsider, you might find that your view of it would be somewhat different if it were you that's been harmed by them.