he's a french catholic priest named father patrick desbois, and, for the past 15 years, he's been tracking down the sites where many of the victims lie and searching for witnesses who are still alive, many of whom had never been asked before to describe the horrors they had seen more than 70 years ago. >> patrick desbois: the general order was to eliminate the last jew, even the baby, even the old they never left anybody. >> logan: so it was a policy of total annihilation. >> desbois: total annihilation, and if hitler didn't lose the war, i think today will not be one jew alive. >> logan: father patrick desbois is on a mission across eastern europe to find hitler's hidden killing fields. before him lies a continent of extermination. these mass graves and extermination sites, many of >> desbois: yeah, totally invisible. under a corn field, under a house, under a tomato field, yeah, yeah. >> logan: and many of them would never be recorded. >> desbois: and never be recorded and still buried like animals. >> logan: we traveled with father desbois to the former soviet republic of moldova, where
