http://news.bbc.co.uk/2/hi/uk_news/england/essex/4295321.stm Salt poison case mother convicted Petrina Stocker poisoned her nine-year-old son, David, with salt A mother has been convicted of killing her seriously ill nine-year-old son by putting salt in his hospital drip feed. Petrina Stocker, 42, of Romford, Essex, denied manslaughter at the Old Bailey. David Stocker died in Great Ormond Street Hospital in August 2001 from an overdose of salt which the prosecution alleged was put into his drip feed. A jury found Stocker guilty of manslaughter on Thursday. She was remanded in custody and is due to be sentenced on Friday. The court heard David was ill for months but doctors were unable to make him better because his mother was misleading them. Food containers spiked Nicholas Hilliard, prosecuting, said the 13 teaspoons of salt poured into a milk drip feed was the last in a series of acts by Stocker. Stocker had spiked two feed containers with around 18 teaspoons and the boy collapsed after the first one was given to him. "The episode of salt poisoning was the last in a series of acts done in an attempt to fabricate aspects of David's illness." -Nicholas Hilliard Son's bizarre death David, who had been a healthy karate champion, was in and out of hospital for five months and had turned into little more than skin and bones.