• Check that sources are not simply referring to one another or to the same source. While it is tempting to believe that the independent source confirms the information already obtained, it might just do so because they are using the same original source.173 Checking the identity of the source, whilst assuring confidentiality, can help overcome this issue. Finally, to assess its coherence, information should be checked against the known factual context, as well as the rest of the material collected. Consideration should not only be given to the credibility of the particular piece of information, but should also assess whether the story as a whole appears to be accurate when all of the pieces of the puzzle are put together. 174 For instance, whether a particular allegation corresponds with a wider pattern of serious human rights violations.175 On-site inspections may also be helpful to verify information, provided that they abide by the do no harm principle. 176 However, bear in mind that returning to the crime scene to verify information with an on-site inspection could pose risks to personal security. Therefore, individuals should never conduct on-site inspections alone and only do them with the support of an organization or relevant network. See Sections 2.2.1 and 2.2.2 in particular on risk assessments and security measures. While the verification of information is in principle a prerequisite for any further steps of storing and sharing information, this is not absolute. Circumstances, such as when lives are at stake, may allow exceptions to this principle. Moreover, corroborating every detail of the information may not always be possible. For example, not all corroborative information may be accessible, such as autopsy reports. 173 Marit Maehlum, Human Rights Monitoring, in MANUAL ON HUMAN RIGHTS MONITORING. AN INTRODUCTION FOR HUMAN RIGHTS FIELD OFFICERS 1, 17 (Kristin Hogdahl, Ingrid Kvammen Ekkerr and Lalaine Sadiwa, eds., 2002). 174 Office of the High Commissioner for Human Rights, Professional Training Series No. 7: Training Manual on Human Rights Monitoring, 104 (2001), available at http://www.ohchr.org/Documents/Publications/training7Introen.pdf. 175 Diane Orentlicher, Bearing Witness: The Art and Science of Human Rights Fact-Finding, 3 HARVARD HUMAN RIGHTS JOURNAL 83, 119 (1990). 176 Office of the High Commissioner for Human Rights, Professional Training Series No. 7: Training Manual on Human Rights Monitoring, 107 (2001), available at http://www.ohchr.org/Documents/Publications/training7Introen.pdf. 116