and 13-month old Sarah-Jane, died when their home on the Gurnos estate in Merthyr Tydfil was deliberately set alight on 11 October 1995. South Wales Police said new forensic technology and techniques would be used as part of the review into a case that originally saw Annette Hewins jailed in 1997, only for her conviction to be quashed in 1999 after she had served two-and-a-half years of a 13-year sentence. Det Ch Insp Gareth Davies, from the force's major crime review unit, said the new forensic methods "were not available previously". During the initial murder investigation three women - Donna Clarke, her aunt Ms Hewins and Denise Sullivan - were arrested. Ms Hewins was jailed after being convicted of arson with intent to endanger life before being freed. She died in February 2017, less than 24 hours after being detained in a mental health unit, after struggling to cope with the miscarriage of justice. Ms Clarke's conviction was also quashed and she was freed from a 20-year sentence in April 1999. Ms Sullivan was convicted of perverting the course of justice and jailed for four years, reduced to three-and-a-half on appeal. "This tragic case sent shockwaves through Gurnos and has cast a shadow over the community ever since," said Det Ch Insp Gareth Davies. (BBC)