A Ghanaian man is leading a campaign to bring The Gambia's former leader Yahya Jammeh to justice over the murder of 55 migrants who were mistaken for coup plotters, writes the BBC's Alex Duval Smith.
Martin Kyere leapt from the pick-up truck into the darkness. Bullets whistled around him as he ran for his life through the thick Gambian forest. He fell. He picked himself up. He dodged the soldiers' searchlight.
He promised himself not to rest until Mr Jammeh was brought to justice.