KHARTOUM, April 27 -- Bahira Amin and Abdelmoneim Abu Idris Ali At a makeshift morgue in Khartoum, engineer turned mortician Ali Gebbai clicked through a spreadsheet of the dead. Thousands of entries, each with a photo and burial site, keep a harrowing record of Sudan's war.

Every time the team of volunteers finds a body, they post to social media and wait 72 hours in the hopes that the victim's loved ones will come across the picture and claim the person.

"We photograph every body. We check if there's anything in their pockets to help us identify them, and we mark the spot where we buried them," Gebbai told AFP.

It was a blazing April day and a dead woman lay on the ground of the small, air-conditioned room in the Sudanese capital, he...