A forensic DNA database comprises of thousands of DNA profiles generated from suspects, convicts or even from common people from society. It is used for the cross-matching of DNA profiles obtained from evidence items collected from a crime scene. These databases are playing a core role in clearing the innocent and solving the dead-end unresolved crimes ultimately leading to crime reduction. In March, 2017, a nine years old minor girl was raped in district Khushab (Province Punjab). The medico-legal examiner indicated brutal sexual violence on the victim. Police apprehended a suspect who was excluded as the source of foreign male DNA from tested evidence items. Thus the case put up a question mark on the capabilities and efficiency of the police. An unknown male DNA profile obtained from evidence items was uploaded to PFSA DNA Database to maintain record. Later on, a suspect was arrested by Karachi (Province Sindh) police in another rape case, DNA profile of suspect was searched in the PFSA DNA Database. This generated DNA profile matched with the foreign DNA profile obtained from evidence items of minor victim, hence this atrocious crime was resolved. PFSA DNA Database provides support to criminal prosecution and also leads to identify potential suspects. It took years of effort to develop the rich PFSA DNA Database which subsequently proved to be fruitful in the exoneration of innocents and conviction of offenders in criminal cases.
Keywords: Child sexual abuse; DNA database; PFSA; STR analysis; Sexual violence.
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