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Video footage reveals horror moment gamer gunman David Katz shot rivals at Florida tournament - Daily Record
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Florida shooting: Gunman David Katz kills two then himself at Jacksonville video game contest | News | The Times
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David Katz: Jacksonville shooting suspect named as gamer, 24, after two killed at 'Madden' tournament | The Independent | The Independent
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Jacksonville shooting – David Katz targeted victim with laser-sighted gun before killing himself in live-stream massacre | The Sun
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Madden shooter David Katz shown on video bragging he was 'one of the better players' a year before killing two at gaming tournament | The Sun
![Four dead and 11 injured in mass shooting in Florida during Madden online gaming tournament | Daily Mail Online Four dead and 11 injured in mass shooting in Florida during Madden online gaming tournament | Daily Mail Online](https://i.dailymail.co.uk/i/newpix/2018/08/27/03/4F6D253800000578-0-image-a-45_1535337796637.jpg)