sometimes reporting details that crime scene commander paul feist preferred to keep secret. >> all ofictims buried out on the west mesa were buried naked, with no clothing on. >> it was a problem. we had things that we wanted to keep very secret, or things that we didn't want released. we had them in the air. they had the big telescoping lenses. they were there constantly. and there were certain processes that it did pose a concern. >> reporter: caught between the pressure to keep the public informed and the need to prevent key details from leaking out to cranks and copycats who routinely clogged tip lines, commander feist found himself scheduling sensitive excavation work in the off hours, when he knew cameras would not be looking over his shoulder. >> i needed to know where they were all the time. that way, again, so if i were doing a different process or if i was looking at something specific, i needed to know that i didn't have the eyes of america in that hole with me. >> reporter: by mid april, after 2 1/2 months of intensive searching, mapping, and aerial photography, commander

. >> reporter: jennifer feist is the sister of dr.reen. >> she said it was like armageddon she said there are so many sick people everywhere. she said people are just dying in waiting rooms before they even get in. >> reporter: on "today" jennifer and her husband corey said dr. breen got sick with coronavirus and days later went back to work. >> i kept telling my sister, you know, if you can't function, you can't help anybody, you have to sleep. >> reporter: sensing she was in trouble, her family and friends got her to a hospital but after being released, she took her own life. >> for somebody whose life calling is helping people and she just couldn't help enough people and the combination was just unbearable. >> i cried the whole way home. >> reporter: arlean van dyke is a critical care nurse. it was devastating when a beloved colleague passed away. >> today we lost him we lined the walls as he was taken away that was a beautiful moment. >> reporter: a study of doctors and nurses in china found a considerable proportion reported depr

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