An Autopsy Report Case of Rape Victim by the Application of PSA Test Kit as a New Innovation for Sexual Assault Investigation in Thailand
Sexual assault is usually an un-witnessed crime. Therefore, forensic investigation and identification of the spermatozoa and semen on the specimen collected from the vagina of female victims plays an extremely important role in the court testimony to confirm the recent episode of sexual intercourse. In fact, microscopic visualization of the spermatozoa is a gold standard method to prove that the female victims had recently been violated. However, if the male offender is a vasectomized or an azoospermic individual, it is impossible to prove the recent sexual event by identification of the spermatozoa and this may let the offender go free. In the US, the reported frequency of azoospermia is 1% to 9% in seminalstains or swabs-examined sexual assault cases and the frequency of contraceptive vasectomy has been estimated to be 750,000 to 1,000,000 per year(1,2). In recent years, the acid phosphatase test was generally used as a routine test for identification of the semen in stains or swabs. However, according to scientific results,...