Sandra Fisher, the grandmother of 8-year-old Imani Green who was fatally shot in Jamaica, told ITV News she found the British girl in a "pool of blood."
Ms Fisher added that Imani, who travelled to Jamaica on Boxing Day, was a "very friendly" girl who "made you laugh" and spoke both Jamaican Patois and English.
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Joshua beat the older, more experienced boxer in front of 90,000 fans in Wembley Stadium.
Dry for most of the night. Rain in the southwest by dawn.
Host Paddy McGuinness tweeted a tribute to contestant Charlie Watkins whose date was featured in Saturday's episode.