“(a) The full thickness, deep, wide transection of the hymen at 7 o’clock posteriorly is diagnostic of blunt force peno-vaginal penetration. Transection is healed tear/laceration, leaving the hymenal rim with a defecit of tissue. Once the tear is healed, it is not possible to date the injury. (b) A cleft at 10 o’clock anteriorly is also a defect/indentation on the hymenal rim. At this position, a cleft has been seen in non-abused children. A cleft may result from blunt force trauma but once it has healed it is not possible to differentiate the cause. (c) The history of pain during the alleged peno-vaginal penetration and complaint of a burning sensation on the following two days during urination (as urine passes over the open tear) is supportive of penetrative intercourse causing the hymenal tear.”
“This is diagnostic. This is actually one of the few things. It is diagnostic of penetrative sex, penetrative injury”
“All literature, abroad and in the UK, it is conclusive that any full thickness transection between 9.00 and 3.00 [sic] is diagnostic. Never seen in any non-abuse children or normal variation of the hymen”
“The strength of this conclusion is unwarranted, as other possible causes have not been considered. The full thickness transection at 7 o’clock would be consistent with a past episode of penetrating injury. It is possible that an accidental injury, such as a fall onto or astride a penetrating object in prepubertal and pubertal girls could cause this type of injury, although this is uncommon. It has even been reported that motor vehicle injury to the lower abdomen of a child can also result in this type of injury (…) but this will be exceptionally rare. There is [sic] also data that deep clefts in the posterior hymen may be found in girls who experience a painful episode trying to use a tampon, but who have not experienced sexual activity.”
“… Dr Aziz clarifies that her evidence that the observed defect was diagnostic of peno-vaginal penetration was on the basis of the history given to her by [the complainant] and the past medical history given by her mother. She considers that this was sufficient to exclude any previous injury to the hymen. I agree that accidental trauma is an unusual cause of hymen trauma, and that usually this would be a memorable event. However this does not prove the allegation and I do not agree it is ever appropriate to call this type of finding diagnostic. The forensic examiner was not present at the time and did not witness the alleged events. The truth or otherwise of an allegation is a matter for the court.”
“74. At trial, both prosecution and defence accepted that the medical evidence showed conclusively that sexual intercourse had taken place. The complainant denied the consequent defence suggestion that she had had sexual intercourse with someone other than Mr Xie. 75. The Commission considers that, in what was otherwise a case of one person’s word against another, independent and undisputed expert evidence that sexual intercourse had taken place was likely to have carried considerable weight in support of the complainant’s account. The jury’s acceptance of the principal evidence in the prosecution case may have been influenced by the apparently scientifically established fact that the complainant had lost her virginity. 76. The combined fresh evidence shows that the medical evidence at trial appears to have overstated the probative value of the complainant’s hymenal injury. The injury, in itself, is not capable of proving conclusively that sexual intercourse has taken place and cannot provide independent confirmation of that event. 77. The Commission considers that ... the verdict may have been based, in part, on unreliable medical evidence…”
“Dr Aziz said: “That is what I found, which is consistent with a young woman having been penetrated by an adult penis or an object of some kind. She said the finding that I, or the symptom that I saw is diagnostic, it is conclusive that the hymen has been over stretched and has therefore been penetrated by something.”