University, London, and trained at Macfarlanes, a city law firm. She moved with her husband to join the law firm Addleshaw Booth & Co in Manchester in 1994. They bought a house in Wilmslow in Cheshire. Conviction for murder Clark's first son, Christopher, was born on 22 September 1996. Court documents describe him as a healthy baby. On 13 December Clark called an ambulance to the family home. The baby had fallen unconscious after being put to bed, and was declared dead after being transported to the hospital. Clark had post-natal depression and received counselling at the Priory Clinic, but was in recovery by the time her second son, Harry, was born three weeks premature on 29 November 1997. However, he was also found dead on 26 January 1998, aged 8 weeks. On both occasions, Clark was at home alone with her baby and there was evidence of trauma, which could have been related to attempts to resuscitate them. Clark and her husband were arrested on 23 February 1998 on suspicion of murdering their children. On the advice of her lawyers she twice refused to answer questions. She was later charged with two counts of murder while the case against her husband was dropped. Clark always denied the charge, and was supported throughout by her husband. During the court proceedings she gave birth to a third son. Clark was tried at Chester Crown Court, before Mr Justice Harrison and a jury. The 17-day trial began on 11 October 1999. The prosecution, led by Robin Spencer QC, was controversial for its involvement of the paediatrician Professor Sir Roy Meadow, former Professor of Paediatrics at the University of Leeds, who testified at Clark's trial that the chance of two children from an affluent family suffering cot death was 1 in 73 million. He likened the probability to the chances of backing an 80–1 outsider in the Grand National four years running, and winning each time. Home Office pathologist Dr Alan Williams withheld the results of bacteriology tests on Clark's second baby which showed the presence of the bacterium Staphylococcus aureus in multiple sites including his cerebro-spinal fluid. During the trial the jury asked specifically if there were any 'blood' test results for this child. Williams returned to the witness box to deal with their query. He was specifically asked about an entry in the notes referring to 'C&S' results. These referred to