article_snippet: Police and firefighters arrived to find the 44-year-old's body in the loft .
article_snippet: At some point during the fire the loft hatch was closed and then opened during the fire which allowed a plume of smoke with gases to enter the loft. '
article_snippet: Explaining how investigators knew it was Jack rather than Jack father of young brother who tried to escape, Jack added: 'Opening the loft hatch made the position untenable.'
article_snippet: All three were inside the loft with the loft hatch closed when the fire took hold. '
highlights_snippet: his had barricaded his two sons into the attic of his property in south Yorkshire .
  
highlights_snippet: Evidence showed eldest son, 12, tried to escape by opening attic hatch .
  