Article 28:
During the process of collection of evidence, the criminal investigation officer shall hear statements of those who may possess information with respect to facts and perpetrators of crimes, question any suspect, and enter the same in the relevant records. They may seek the assistance of experts, including physicians, and seek their advice in writing.
Article 101:
When the accused appears for the first time for an investigation, the Investigator shall take down all his personal information and shall inform him of the offense of which he is charged. The Investigator shall record any statements the accused expresses about the accusation. The accused may be confronted with any other accused person or witness. After statements of the accused have been read to him,
1. States Parties shall, in accordance with the provisions of this Part and under procedures of national law, comply with requests by the Court to provide the following assistance in relation to investigations or prosecutions:
(c) The questioning of any person being investigated or prosecuted;