Circumcised bits in freezer, witchdoctors?

I just read a news report about a man in Africa arrested for having clitorises from female circumcisions in his freezer. He has been arrested on other charges as well, and in the past for illegally selling elephant tusks. Was he also selling female parts along with the tusks I wonder? He claims he knew nothing about the female parts in his freezer but said his wife, who was murdered a month ago, had connections with witchdoctors who used them. So, who are these witchdoctors who use circumcised parts, is it possible they were selling them for medicinal purposes same way people sell rhino horns and bear bile?

Here is the news report on the man http://www.mirror.co.uk/news/world-news/man-who-stashed-21-pieces-6487405