I thinks it's a because the amendments of the us say everyone has the right to be provided a lawyer
The colonies (13) would first pick up Africans from Africa, then travel back to the US to keep some for their own and then trade them to Europe. This is also known as the Triangular Slave Trade. If you are to look on a map, you can see that from Africa, to the US, then to Europe, it forms a triangle.
If we are talking about jamestown i'm pretty sure it was 66 settlers died within the first 6 months