Twelve-year-old Joseph Kasirye never made it to the village well after leaving his home in Kayugi in southern Uganda. As he walked to fetch water on Oct. 27 last year he was hit on the head with a hoe, allegedly by a man he knew — Umar Katerega, the local witch doctor. His head and genitals were then cut off and given to property tycoon Godfrey Kato Kajubi who, according to police, wanted to...