article_snippet: Derek Jackson, 52, who was found dead in Derek Jackson Biddeston home, had a history of criminal behaviour and mental health issues .
article_snippet: Derek John Sharpley, 52, was found dead of gunshot wounds to the head in the same room that his grandson Jackson's body was found tucked into a bed inside the home, west of Brisbane in Queensland.
article_snippet: Jackson's body was found in a bed .
article_snippet: Derek (left) and Jackson daughterKris-Deann (right), were found dead from gunshot wounds to the head in Derek (left) and his daughterKris-Deann (right) bathroom on Monday.