Well, nobody was killed for stealing garri. To be honest, someone was killed by a mob, but not for stealing garri (cassava grains). The victim is also a grownup in his 20s not a 7-year-old - as the pictures show.
The incident actually happened in Lagos on Tuesday 15 November 2016 (see graphic photos and pictures here). According to Oladipupo Raphael Dare who first broke the news on Facebook, the unidentified suspect was lynched by an angry mob and burnt to death for stealing a mobile phone.
From the story, we can see that Africans are still barbaric (just like we've always been) but nobody was burnt to death for stealing a 50 naira cup of garri.