Forensic experts in Nepal are employing DNA testing to identify hundreds of bodies following devastating floods triggered by a glacial collapse near the Langtang Lirung mountain peak. The disaster, which also affected Tibet, has killed more than 1,270 people, with authorities reporting over 4,700 still missing as of Thursday.

The scale of the tragedy has overwhelmed morgues, necessitating advanced identification methods. Police are requesting first-degree relatives – parents, children – of those unaccounted for to provide fresh blood samples for DNA profiling. For foreign nationals missing in the floods, relatives abroad can submit DNA profiles from their home countries via email to Nepal Police for comparison.

Hundreds of DNA samples have already been collected from grieving families and are being processed at the Nepal Police Forensic Science Laboratory and the Nepal Academy of Science and Technology. The urgent need for DNA identification arises from the severe decomposition and mutilation of many bodies, making visual identification impossible.

Forensic teams have noted that while identifying features like tattoos and jewelry can sometimes assist, the advanced state of decomposition frequently renders such methods insufficient. This is where DNA testing becomes indispensable, offering a scientific means to establish identity when all other visual or physical markers have been lost.

Experts explain that DNA can be extracted from various biological materials, including blood, soft tissue, bone, and teeth. Molecular biologist Kerstin Montelius highlighted that even when most soft tissue has decomposed, DNA material can often still be recovered from bone. This capability is critical in flood scenarios where bodies may be submerged for extended periods.

While DNA offers a reliable identification method, it is not without its challenges. Montelius cautioned that DNA itself degrades over time, and environmental conditions significantly influence the success and speed of the extraction and analysis process. The effectiveness of DNA identification depends on the quality of the samples and the prevailing circumstances.

The ongoing efforts underscore the immense logistical and scientific challenge of accounting for all victims of such a catastrophic event. The use of DNA technology reflects a commitment to providing answers and closure to families grappling with the uncertainty of their loved ones' fates.

As rescue operations continue, including the recent successful extraction of two workers from flooded hydropower tunnels, the focus on identification remains paramount. The collected DNA data will be cross-referenced with samples from relatives to establish positive matches, a meticulous process aimed at bringing a measure of certainty to the disaster's aftermath.