Witchcraft is a practice which remains common in some parts of Africa. At its darkest, its rituals include violence against women and children.

When she was 17, Rose Nanyonga Clarke refused to join in the use of witchcraft and instead walked - literally - from her Ugandan village to a new life.

She is now studying at Yale University and last summer she organised a trip back to Uganda to retrace her steps to freedom.

This is her First Person account.