| ||Sally Clark arrives at court||
Medical evidence which could have cleared solicitor Sally Clark of the murder of her two baby boys was "kept secret" from her defence team, the Court of Appeal has heard.
Clark, who has always protested her innocence, was jailed for life after being found guilty by a jury at Chester Crown Court in November 1999.
She was convicted of smothering 11-week-old Christopher in December 1996 and shaking eight-week-old Harry to death in January 1998 at the family home in Wilmslow, Cheshire.
Clark, 38, appeared in the packed London courtroom as three judges began the review of her convictions.
In written documents her counsel, Clare Montgomery QC, told how for nearly three years after the death of Harry, his mother, her lawyers and their medical advisers believed there was no evidence of infection or any possible natural explanation of his death.
But she said by the end of 2000 clear evidence had emerged of a staphylococcus aureus infection that had spread as far as Harry's cerebral spinal fluid.
The barrister said that evidence of this infection had been known to the prosecution pathologist who had conducted post mortems on both children since February 1998.
She alleged that "he had kept the results secret from Sally Clark and her advisers" and that it was a clear case of non-disclosure by the prosecution.
"It is obvious that, if the results had been made known at trial, Sally Clark would not have been convicted of murdering Harry or his dead brother Christopher," she said.Clark's first appeal bid failed in 2000 when the Court of Appeal then ruled that the case against Clark was "overwhelming".
But the case was referred back to the Court of Appeal by the Criminal Cases Review Commission, which investigates possible miscarriages of justice.
The hearing is expected to last four days.