A scientific discovery that could free baby-killer Kathleen Folbigg

Kathleen Folbigg has served almost 20 years in jail for killing her four children, but now modern science is raising doubts about her guilt.  Today, Background Briefing’s Rachael Brown on growing calls to reopen her case and whether the legal system needs reforming to keep up with scientific advances.  Featured:  Rachael Brown, reporter, Background Briefing.