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By:

Dr. Keshav Kumar

3 February 2025 at 7:36:17 am

The Science of Gait Analysis

As facial recognition reaches its limits, the science of how we walk is emerging as a powerful new tool in forensic investigation. In today’s world, where surveillance cameras are present everywhere, identifying a suspect is no longer restricted to only fingerprints and facial recognition. Modern forensic science has shown that the way a person walks provides valuable evidence during a criminal investigation. This unique walking pattern, known as gait, has emerged as a valuable behavioural...

The Science of Gait Analysis

As facial recognition reaches its limits, the science of how we walk is emerging as a powerful new tool in forensic investigation. In today’s world, where surveillance cameras are present everywhere, identifying a suspect is no longer restricted to only fingerprints and facial recognition. Modern forensic science has shown that the way a person walks provides valuable evidence during a criminal investigation. This unique walking pattern, known as gait, has emerged as a valuable behavioural biometric. By analysing gait from CCTV footage, forensic experts help investigators identify suspects, particularly when other methods of identification are unavailable. This makes gait analysis useful in cases involving masked offenders like kidnappings, murders, robberies, terrorist attacks and other crimes captured on surveillance cameras. Although gait analysis is now an important forensic tool, it originated in the medical field, where doctors studied walking patterns to diagnose movement disorders. Over time, researchers discovered that every individual has unique walking patterns, influenced by their age, height, body structure, injuries, habits, and footwear. Advances in video technology, computer-based analysis, and artificial intelligence have transformed gait analysis into an important scientific tool in criminal investigations. Notable Cases India has witnessed several notable cases in which gait analysis played a key role in criminal investigations. One of the most notable examples is the 2021 Saki Naka rape and murder case in Mumbai. The CCTV footage captured the accused's body movements near the crime scene. As facial recognition alone was insufficient, forensic experts compared the accused's walking patterns with the individual seen in the footage. The gait analysis report, along with CCTV evidence, witness statements and other findings, strengthened the prosecution’s case. Rather than serving as a standalone proof, gait analysis acted as corroborative evidence. Recently, during the investigation of the 2026 Ketan Agarwal murder case in Pune, investigators compared the accused’s gait with CCTV footage, as the suspect’s face was allegedly hidden with a hoodie. Investigators recreated the suspect’s walk under similar conditions to compare it with CCTV footage, highlighting how gait analysis is becoming a valuable investigative source in India when traditional methods of identification are limited. In State of Tamil Nadu v. Ponnusamy (2026 INSC 507), the Supreme Court observed that Gait analysis is a useful scientific technique for identifying suspects; however, the court also clarified that gait analysis should not be treated as the only evidence but rather should be used alongside CCTV footage, witness testimony, and other forensic findings. This approach encourages the use of scientific evidence while protecting the fairness and credibility of the judicial process. Recent scientific research highlights advanced forensic gait analysis through artificial intelligence, machine learning, and deep learning. Unlike fingerprints or facial features, gait can remain useful even when a suspect’s face is concealed or the image quality is poor. By examining factors such as stride length, walking speed, body movement and the timing of each step, experts can identify patterns that may help establish whether two video recordings show the same individual. Modern systems combine spatiotemporal and biomechanical gait measurements for analysing walking patterns, even from low-quality CCTV footage, which makes gait analysis faster, more accurate, and increases its value in criminal investigation. The growing importance of forensic gait analysis highlights the work of experts and institutions across the world. In India, experts such as Dr. T.D. Dogra and Dr. B.R. Sharma made remarkable contributions in the field of forensic science. Internationally, Professor Mark S. Nixon pioneered gait recognition research. Government organisations such as the Directorate of Forensic Science Services (DFSS), Central Forensic Science Laboratories (CFSLs), and the National Forensic Sciences University (NFSU), along with private organisations like Truth Labs, support research and the use of modern forensic technologies in criminal investigations. As forensic science continues to emerge, gait analysis opens up with new possibilities in solving crimes and delivering justice. While it only serves as one piece of the puzzle, it provides valuable clues when used with other evidence. After all, every step has a story to tell, and sometimes, that story leads investigators to the truth. (Writers are experts in forensic matters. Views personal.)

Listening Beyond the Silence

3 hours ago
3 min read

A parent’s most natural question to a child away at college is ‘how are you doing?’ and the most natural answer, almost reflexively, is ‘I’m fine.’ Between those two lines lies an entire crisis that Indian families, teachers and administrators are only beginning to take seriously. The tragedy is not that warning signs are absent; it is that they are so often missed, dismissed as a ‘phase,’ or noticed only after it is too late.


India’s premier campuses have offered painful proof of this in recent months. On September 19, 2026, a second-year student at IIT Bombay died by suicide after being questioned over alleged unauthorised phone use during an examination, a death that marked the third reported suicide on the institute’s campus in just six months and triggered protests by over 400 students who accused the administration of exerting disciplinary pressure on a young person already struggling. The institute maintained that no formal disciplinary action had been initiated against the student. This is not an isolated tragedy; IIT Bombay alone recorded student deaths in February, July and September of the same year, part of a wider pattern across India’s IITs that saw ten student suicides reported system-wide in 2025.


The scale, when measured, is sobering. Student suicides in India rose from 12,526 in 2020 to 14,488 in 2024, an increase of nearly 16 percent in just five years, even as the country’s overall suicide numbers largely plateaued. Broken down, that is close to 40 students dying by suicide every single day or one roughly every 36 minutes. Ragging, too, continues to claim young lives quietly: complaints registered with the National Anti-Ragging Monitoring Agency climbed from 870 in 2022 to over 1,300 in 2025 and at least 56 students are known to have died by suicide linked to ragging in the same period, a toll that almost certainly understates the true number, given how much goes unreported out of fear, shame or institutional pressure. Behind every one of these figures is a young person who, at some point, gave off a sign that something was wrong.


Recognising the Signs

The warning signs themselves are not exotic — withdrawal from friends and family, changes in eating or sleeping patterns, a sudden decline in academic performance, expressions of hopelessness, increased substance use or a growing disinterest in activities once enjoyed. In the Indian context, these often surface during a student’s visit home for Diwali or summer break, when a parent notices a child who has grown unusually quiet, is skipping meals or has stopped mentioning friends they once spoke of constantly. Too often, these changes are read through a narrow lens — ‘exam stress,’ ‘adjustment issues,’ ‘he’ll be fine once results come’ — rather than as patterns worth a direct, caring conversation.


Parents can begin by directly, calmly asking if their child has ever felt so overwhelmed that they thought of hurting themselves, a question many Indian parents instinctively avoid for fear of ‘putting the idea in their head,’ when in truth, asking gently rarely does harm and often provides enormous relief to a struggling student. This should be followed by listening without judgment or lecture, offering reassurance that such struggles are common and treatable rather than a mark of weakness or family shame and then gently encouraging the student toward the college counselling cell, a trusted teacher or a professional rather than assuming the problem will resolve itself with a stern pep talk about ‘focus’ and ‘discipline.’


Effective Support

Indian parents and teachers alike would do well to establish a predictable rhythm of contact like a weekly call, not only triggered by falling grades or a worrying rumour from a hostel-mate and to ask open-ended questions such as ‘what has felt hardest this week?’ rather than the reflexive ‘how are studies going?’ Colleges must move their anti-ragging cells, wellness centres and helpline numbers from decorative notice boards into genuinely functioning, year-round services, staffed by counsellors students actually trust and know how to reach. Teachers, wardens and mentors need at least basic sensitisation in recognising these signs, since they often see students far more regularly than parents do.


None of this requires parents or teachers to become mental health experts. What it requires is the willingness to treat a quiet, withdrawn child not as someone going through a passing mood but as someone possibly asking, in the only language available to them, to be noticed.


(The writer is a former college Principal and Founder of Supporting Shoulders, an Odisha-based non-profit Trust. Views personal.)

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