celebrities involved as well? >> reporter: what's so inning about this is the fact that this is an incredibly serious trial. former charles taylor accused of fueling a bloody civil war in sierra leone and using the proceeds of rough diamonds, unpolished version, to fuel that war. the prosecution says that they want naomi campbell to answer as to whether or not she received a rough diamond from charles taylor. that, they say, would prove he actually was in possession of them. right now the former liberian president says i have never used rough diamonds or sold them for any purpose. mia farrow is confirming that naomi campbell did receive a blood diamond from charles taylor. she refused to cooperate so far. no comment from her or her lawyers, to cnn, when the subpoena was issued yesterday,