Online ISSN: 2515-8260

Keywords : mixture interpretations

Forensic Approach Analysis of Multipartner (STR) for Identifying the Suspects in Iraqi Sexual Assault Cases : A Case Study

Ruaa Mohammed Mahdi; Da ad A. Hussain

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 2, Pages 168-176

DNA has become a powerful forensic tool for solving cases such as linking a suspect to a
crime scene, resolving biological relationship issues and identifying disaster victims. DNA
fingerprinting can be used to help identify individuals by revealing the differences in the
DNA sequence among different people. Certain non-coding regions of DNA exhibit
significant differences in base pair sequence among individuals. Such regions are called
polymorphisms. DNA investigations mainly involve two steps; the obtaining of DNA
profiles from biological samples and the interpretation of the evidence given by these DNA
profiles. Chromosomal DNA was extracted from semen samples as well as from blood
stain more over PCR technique applied to amplify STR loci, while the detection carried out
by capillary electrophoresis .Then making the interpretation by matching DNA profiles that
obtain from both suspects and victims with the DNA profiles that obtain from the objects
in the crime scene. The case involve seven forensic samples, one female victim (A), three
suspects (B, C, D) and three clothes (brown underwear, blue jeans and shirt belong to
victim A).. DNA extraction from the semen contamination in these samples give DNA
fingerprints with a mix profile that’s belong to more than one suspect.