Investigated. you heard president biden talk about the importance of preserving evidence for potential war crimes, but i guess the question is how difficult is it to do that in the midst of this war zone? exactly. i mean, with the horrific images we re seeing from bucha we don t know the exact circumstances of how some of these people were killed. some of them may have been victims of summary executions, especially the cases where we clearly see their hands are tied. some of them may have been killed during russian shelling. some of them may have been caught in cross fire. some might have been trying to evacuate. each body has its own story. in terms of uncovering mass graves in bucha and elsewhere, sites like that should be treated as crime scenes.