New Delhi: In a significant breakthrough related to the Delhi blast near the Red Fort, forensic analysis has confirmed that the deceased individual was terrorist Dr Umar Mohammad.
DNA samples from the blast site were matched conclusively with those of Umar and his mother, resolving initial identification challenges caused by the severe blast damage.
The blast was so intense that Umar’s body was severely burned, complicating his identification. However, the forensic team successfully matched DNA extracted from the site remains with samples taken from Umar’s mother in Pulwama, confirming his presence in the car involved in the explosion.
Interesting forensic advancements are now exploring the use of unusual biological samples such as earwax for DNA testing. Earwax, often overlooked, contains cellular material including nuclear and mitochondrial DNA, making it a viable source for identification.
Experts explain that DNA extraction from earwax follows standard protocols: secure sample collection, lab-based DNA extraction, primary testing, followed by STR profiling or mitochondrial DNA sequencing.
Studies have shown an approximate 80% success rate for DNA tests using earwax, though accuracy depends on sample quality and age.
Despite being a non-invasive and easily accessible sample, earwax has limitations. Samples exposed to open environments or extreme conditions like burning can degrade, reducing DNA integrity. In such cases, forensic teams rely on more robust samples like bones, teeth, nails, or mitochondrial DNA. When earwax or other samples are unavailable or inadequate, investigators also use blood, saliva, skin swabs, hair roots, nails, and bone fragments.
These advances in forensic science continue to enhance investigative capabilities, even in challenging scenarios involving severely damaged biological material.