convicted of the murder told the court in cape town that mr. darani arranged the killing. mr. darani denies any involvement. the bbc's nick davis told me how the case unfolded. >> she was actually murdered just over -- close to a a month ago. november 13. just go back in time. what happened while she was going from the area of cape town, she was with her husband and traveling in a taxi when it was carjacked, simply carjacked. he was taken out of the vehicle. so was her husband who has been arrested today. but she was later found dead, shot in the neck. and at a time many were concerned how this had happened and raised questions about security in south africa, but only yesterday in the cape crown court, cape high court that we found allegations came forward that her husband possibly was involved in this. and that's the reason why today he was arrested by members of the metropolitan police extradition unit. their job to put in place a warrant which was issued by the south african...