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epa02186748 A handout image obtained from Cumbria police on 04 June 2010 shows David Bird , twin brother of Derrick Bird , 52 , who was found dead at his house on High Trees Farm , Lamplugh . The shooting rampage 03 June in Britain in which taxi driver Derrick Bird killed 12 peopleinjured 11 before turning the gun on himself could have been triggered by a family feud over a will , reports said 03 June . Police in the picturesque north-western county of Cumbria kept tight-lipped about the possible motive behind Derrick Bird ' s killing spree . But the Guardian reported he had warned colleagues at the taxi rank : " There ' s going to be a rampage in this town tomorrow . "  EPA/CUMBRIA POLICE HO BEST QUALITY AVAILABLE EDITORIAL USE ONLY/NO SALES