In July 2018, a distressing video showing the murder of two women and two young children began to circulate on social media. The footage shows a group of soldiers leading them down a dusty footpath, blindfolded, forced to the ground, and shot 22 times.

After speculation online, the BBC's new investigative unit, Africa Eye, took it upon themselves to look at the visual clues in the video to find out where the atrocity took place.

Using a variety of freely available tools, staff at the broadcaster and a group of independent open-source analysts online were able to use what they saw to distinguish the exact location, time frame, and identities of the murderers.

In this week's podcast, we speak to:

They tell us the steps they took to debunk the video using both traditional and more modern digital journalism techniques, and how your news organisation can use open source investigative approaches to produce compelling digital stories.

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