I think it's really important to look at these kinds of problems contextually, and to beware the identity politics lens.
Indigenous women are over-represented in populations like prostitutes, and women that come into contact with social services. The reasons for that are complicated and not fun reading, and they also stem from difficult social problems that aren't easily solved.
The CBC is not that trustworthy on this stuff though, any more than they are about trans questions. They are quite happy to give the impression that someone like Pickton was targeting First Nations women, when in fact he was targeting prostitutes. They are also quite happy to leave aside the question of whether these kinds of sterilisations were being pushed on women with serious addiction or other problems, or if they were approaching similar non-native women.
The CBC would rather have a headline that mentions any identity group being abused directly than ever ask a question about what the deeper story is. What doesn't get mentioned in a lot of reports about cases like Pickton's are the stories of the non-native women that were murdered, or why it is that First Nations women are over-represented in prostitution in Vancouver.