Five years ago passenger flight MH17 was en route from Amsterdam to Kuala Lumpur when it was shot down over conflict-hit Ukraine.

Investigators blame Russian-backed separatists who they say targeted the plane with a Russian-made missile.

One of the reasons they’re sure is because of the work of Eliot Higgins. He founded the website Bellingcat, which describes itself as "the home of online investigations".

Eliot tells us how he traced the missile system from Eastern Ukraine back to Kursk in Western Russia. And how he used voice recognition software to match Russian officials to intercepted calls made by the Ukrainian secret service.

To hear the whole story of the MH17 investigation head to the Bellingcat website and listen to their new podcast: https://www.bellingcat.com/resources/podcasts/2019/07/17/mh17-episode-guide-1/.

Produced by Duncan Barber