Journal
JOURNAL OF FORENSIC SCIENCES
Volume 66, Issue 4, Pages 1506-1519Publisher
WILEY
DOI: 10.1111/1556-4029.14690
Keywords
drones; forensic search; geoforensic search strategy; geophysics; neonate burial; Normalised Difference Vegetation Index; remote sensing; unmanned aerial vehicles; Visual Atmospheric Resistance Index
Categories
Funding
- Police Service of Northern Ireland
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This study documents the experimental search and discovery process of a homicide and burial case of an infant in 2004, using ground-penetrating radar and drone aerial imagery technology, successfully identifying the burial location of the perpetrator.
A woman reporting the homicide and burial of an infant in 2004 prompted the creation of an experimental simulated neonate grave shortly before the real search commenced. The real case, documented here, did not use aerial imagery, but used ground-penetrating radar (calibrated to the test site described here) to identify two locations that were probed for gas release and the deployment of victim recovery dogs. We suggest technological advances in remotely sensed aerial imagery that have developed since 2004 will demonstrate their use in focusing such searches by informing a Geoforensic Search Strategy (GSS) and suggesting locations accessible by a perpetrator to identify a burial location using the still-existent analogue site. To test this, in the spring of 2020 a DJI Mavic Pro drone was flown over the control site containing the simulated 2004 burial. Aerial image processing included the creation of orthomosaics, Normalised Difference Vegetation Index (NDVI), Visual Atmospheric Resistance Index (VARI), and photogrammetry. Conventional ground-based geophysical surveys using ground-penetrating radar, guided by this new type of information integrated into the GSS, confirmed that anomalies seen in drone data were the 16-year-old burial. We test this strategy using both the original simulated burial in Northern Ireland and further evaluate it in two recent simulated graves in the United States in more complex scenarios, but with successful results.
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