The first civilian trial for a Guantanamo Bay detainee has been delayed after a judge told prosecutors they cannot predict their star witness.Lewis A Kaplan, the US district judge, blocked the government on Wednesday from calling a man who authorities said, sold explosives to Ahmed Khalfan Ghailani, the defendant.Defence lawyers say investigators only learned almost the witness after Ghailani underwent harsh interrogation at a confidential CIA-run camp overseas between 2004 and 2006.
