Who Killed Meredith Kercher?

Who killed Meredith Kercher seemed to be the main question the Brits were asking after the aquital of Amanda Knox and her boy friend. They seemed to ignore the fact that the murderer was safely tucked up in an Italian jail. They just couldn't believe that he was the only murderer. He was a drug dealer and a petty thief from Africa. He had to be helped by a young white middle class girl from a very balanced family who spent most of her life in the very civilised city of Seattle, and a young man,son of a urologist who had become her boyfriend. It just boggles my mind that people could think that these three could have got together to slit the throat of a room mate of Amanda Knox. This sort of thing just does not happen.