This Tribunal was established under the International Crimes Tribunal (Tribunals) Act, enacted in 1973 by Bangladesh Parliament to provide for the detention, prosecution and punishment of persons for genocide, crimes against humanity, war crimes and other crimes under International law committed in the territory of Bangladesh during the War of Liberation particularly between 25 March to 16 December 1971.
For the purpose of Investigation into the crimes specified in section 3(2) of International Crimes Tribunal Act-1973, the Government established an Investigation Agency consisting initially with18 Investigators (Sec-8).
The Coordinator and Co-coordinator in the rank of Inspector General of Police are the overall controlling officers of Investigation Agency.

1) Conducting research about the International Crimes and area of occurrences.
2) Systematically surveys the area of Crimes and formulates a plan of procedure.
3) Conducting a thorough search to Books, News papers, Television programs and other published articles regarding International Crimes.
4) Collection of evidence from different sources.
5) Making a good contact with the Victims, Witnesses, Freedom fighters and others persons witnessed the incident during the war of liberation in 1971.
6) Engage reliable sources for collecting information from the area of incident.
7) Reading of Books published during and after the War concerning the Crimes and Criminals.
8) Co-ordinate and have a good relationship with the civil society members, all NGO,s and other agencies relating with Liberation war of Bangladesh.
9) Collection of documents concerning the Crimes from National Archives, Bangla Academuy, PIB, Public Library and other agencies from home and abroad.
10) Patriotism, honesty, hard work, patient and sense of humanity are the basis of success in Investigation of International Crimes.
11) Crime Scene is the pre-requisite to find out the truth of any Crime. The Investigation officer conducts investigation of the Crime Scene though the incident occurred 42 years ago.
12) The victim and witnesses should be there for reconstruct incident and will provide the information about the position of perpetrators and victim during the time of occurrence.
13) At the Place of occurrence the Investigation officer prepares Sketch map, Index, photograph of the crime scene, if required taking video of the PO.
14) Search and Seizure are important task for the Investigator, important documents should be seized properly.
15) Reports and other documentation pertaining to the crime scene investigation shall be compiled into a case file. This file shall be a record of the actions taken and evidence collected at the scene. This documentation shall allow for independent review of the work conducted.
16) The Investigation officer records the statements given by the Victims, Witnesses, Freedom fighters, other eye witnesses and the persons present at scene during the crimes committed and prepares necessary investigation reports after documentation of all collected information and documents during investigation.
17) The Investigation officer submits investigation reports to the Chief Prosecutor, who in his power submits a report to the Tribunals Registrar.
18) The Prosecutor in charge of the case should be in crime scene to assist Investigator in different stage of Investigation.

1) The crimes committed during the Liberation war of Bangladesh in 1971, 45 years has passed already.
2) Maximum Victims and Witnesses of the Incidents expired and many others left the country forever.
3) The physical Evidences have been destroyed by the Perpetrators during the last days of war and during surrender. The paper document etc which were in custody of various departments have also been destroyed after the changes in 1971 by quarter interested party.
4) The perpetrators by this time become a big-gun of the society and have the power in every sectors of society; they have been managing to escape from the Justice.
5) The Victims and Witnesses are always in threat and afraid of physical assault, murder, kidnapping and other crimes that they apprehend.
6) Collection of Physical evidence almost impossible. Experiences shows the investigation officers could hardly collect physical evidences.
7) Unfortunately the victims of the International Crimes are mostly poor, sick and not established. On the other hand the perpetrators are well settled in all spares of live.
8) The sexually violated victims are not willing to come forward to depose in Tribunal for trial for social folios and to divulge. They and their family do not want the truth that they were sexually violated.
9) During the war of liberation in 1971 about one crore people deported to India as refugees. Maximum of them did not back Bangladesh. Some of them were the eye witnesses of Crimes occurred at that time.
10) Provisions of bars: B.P.C, Cr.P.C & Evidence Act are barred in the Tribunals.