For six months, nine-year-old David Stocker had been in and out of hospital with a debilitating but mystery illness. His condition baffled doctors at Great Ormond Street and he was put on a drip - but what the medical staff didn't know was that David was being slowly and systematically poisoned by his attentive but deranged mother, Petrina, a long-term sufferer of Munchausen's Syndrome. After David's death, Petrina was found guilty of manslaughter and sentenced to five years
click here to see where to watch or .
Ready to Watch Real Crime, Season 1, Episode 5?