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Recent improvements in DNA technologies have allowed for the successful collection and analysis of touch DNA from evidence where it was not previously possible.1 These advancements have expanded opportunities to collect and identify forensic evidence that can potentially resolve violent crimes.
In collaboration with investigators, medical examiner and coroner (MEC) personnel can locate on a victim’s body where a suspect may have touched and deposited their DNA during a crime. Swabs of these areas taken at the scene or during autopsy may yield suspect DNA profiles sufficient for direct comparisons or upload into the Combined DNA Index System (CODIS).2
Once a victim’s body has been cleaned during autopsy and prepared for final disposition, opportunities to collect evidence that may link a perpetrator to the death have vanished. Considering the potential value of body swabs and touch DNA analysis in suspicious death and suspected homicide investigations, law enforcement and MECs should examine their policies and procedures related to evidence collection to ensure this potentially crucial evidence is not lost.
This article will present guidelines to help law enforcement and MECs ensure the preservation of critical evidence. The authors encourage agencies to standardize proactive collection of additional body swabs for touch DNA in all suspicious deaths and homicides. Following such practices can increase the chances of resolving violent crimes and, ultimately, serving justice.
