Police have launched a murder investigation after a pensioner died two weeks after a devastating house fire which left three others critically injured.<br /><br />John Edwards, 82, was rescued from the blaze which tore through the semi-detached property in Wednesbury, West Mids, on May 11.<br /><br />West Midlands Police revealed today (Thurs) that despite the efforts of medics, the OAP tragically died two weeks later in hospital on Sunday (25/5).