Stacey Dooley travels to Canada to report on over a thousand unsolved cases involving the disappearance or murder of indigenous women and girls, spanning decades.

Canada has a dark secret - the disappearance and murder over decades of over a thousand indigenous women and girls. Stacey travels to British Columbia and Alberta to find out more about what some believe is a national scandal.

She begins on a remote road dubbed the Highway of Tears, where dozens of woman have vanished or been murdered since 1980 whilst trying to hitchhike. As a national enquiry is launched, it has emerged that there are cases across the country - but why do so many remain unsolved?

Stacey meets the family of Amber Tuccaro, who was 20 when she was abducted and murdered in 2010, who feel there are still so many unanswered questions about Amber as well as four other victims found in a six-mile radius.

The indigenous Canadian community has criticised the police, accusing them of failing to investigate indigenous cases properly. In the words of one elder, 'some of the biggest racists carry a gun and they carry a badge.'

Stacey meets the police to ask what they are doing to address this issue and bring closure to the families of the missing and murdered.