Absence of witnesses stalls trial of train attack negotiator Tukur Mamu The trial of train attack negotiator Tukur Mamu was on Tuesday, stalled due to the absence of witnesses in court. The trial was scheduled to proceed before Justice Inyang Ekwo of the Federal High Court in Abuja. However, when the matter was called, the lawyer to the Attorney-General of the Federation (AGF), David Kaswe, informed the court of their challenge. Kaswe said though the prosecution still had three more witnesses to call to establish its case against Mamu, he said the next...