A Federal High Court in Abuja has heard that several victims rescued from the 2022 Abuja–Kaduna bound train attack lodged written complaints with the Department of State Services (DSS) against alleged terrorist negotiator, Tukur Mamu. The witness told the court that six victims were interviewed during the investigation and confirmed that none of the interviews was conducted in the presence of Mamu. On other aspects of the investigation, the witness disclosed that a former Chief of Defence Staff, General Lucky Irabor (rtd. He said Major General Idris Garba was not interviewed, while General Jalingo was interviewed, also without the defendant present. However, Usman told the court that the defence would rather apply for a date to open its case, stating that they would not file a no-case submission.