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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.)

Caste-based Census Sparks Nationwide Debate

Writer: Darshan Solanki
Darshan Solanki
Oct 2, 2024
3 min read

Updated: Oct 22, 2024

Caste-based Census

Caste-based identities continue to dominate rural India, directly or indirectly shaping electoral outcomes. Many major elections are influenced by specific caste groups. After the Bihar government released the first phase of its caste-based socio-economic survey, the caste census became a hot topic. The results, backed by evidence, showed improvements in the living standards and social status of marginalised communities, both in cities and villages. With parties like the JDU and NCP backing a caste census, there is growing momentum for the government to conduct one. However, every story has two sides—joy and sorrow. Even Mahatma Gandhi, the Father of the Nation, raised concerns about the caste census.

Rahul Gandhi accused the BJP of being “anti-Bahujan.” The clear meaning is that his father and forefather refused to execute a caste-based census, which might have far-reaching effects and even permanently fracture India’s social fabric. This may be negative for caste-based beneficiaries. The last caste census in India was conducted in 1931 by the British government. Those times were different from the present scenario. The data was made public and became the basis for the Mandal Commission Reports and reservation policies for Other Backward Classes. Rashtriya Swayamsevak Sangh (RSS) has clarified that the caste-based population count data will not be used for core politics. But the agenda for politics is always twisted and expanded.

The Central Government also joined the legal debate by filing an affidavit with the Supreme Court, leaving the matter unresolved. India’s partition, rooted in the divide-and-rule strategy, is frequently cited as a cautionary tale. Including caste in official census data could further deepen social divides. This issue has become a political pressure point, with various states pushing the Centre for action. Although the Constitution uses the term “class” instead of “caste,” the Supreme Court has consistently ruled that caste is a relevant, and at times, sole or dominant criterion for defining a backward class.

After the release of caste-based census data in Bihar, discussions around conducting similar censuses have gained momentum in states like Rajasthan, Chhattisgarh, and Jharkhand. Karnataka, which has already conducted its own caste census, may release its data soon as well.

Notably, all these states are governed by anti-BJP parties. Congress leader Rahul Gandhi also announced that Congress-ruled states have committed to carrying out caste censuses. Meanwhile, the BJP has remained silent on the matter, creating a significant roadblock.

Caste-based censuses focus on proportional representation in areas like jobs and education, with the argument that this will aid in targeted planning for the disadvantaged. However, the situation remains unclear, much like a foggy winter morning. The BJP’s stance on caste-based censuses and reservations seems different, as they fear the caste-based calculations could fragment their traditional Hindu voter base—an underlying concern for the party.

Professor Sanjay Kumar from The Centre for the Study of Developing Societies, says, “Let alone the BJP; no party can openly oppose it; it is not free from danger. BJP gets a large number of votes from the OBC community, their population across the country would be around 52%. Another downside is that the caste-based censuses could disrupt the balance of socio-economic zones. Data theft is a common issue in government systems, and people may feel disconnected from their actual rights.

The moot question is that if the financial status of an ST/SC/OBC or Dalit citizen moves up by a few notches, will his social status change automatically? The lifestyle of any class will only change when the income of a particular class is changed. The actual source of income is employment. The reality is that only metro cities have enough place and space for workers. Aside from the GIDC and IT sectors, less than 30% of industries have their own designated vacancy periods. After a decade, the Jamnagar and Rajkot Corporations have opened their doors to newcomers alongside experienced staff. However, age and caste bias often operate behind the scenes. It’s important to recognise that poverty is also widespread among many upper-caste individuals, and their needs cannot be overlooked. In the overall interests of the nation, terms like SC/ST/OBC, Dalits, etc. must be deleted from the nation’s vocabulary. Every citizen should have only one classification, that of being an ‘Indian’, in the spirit of the constitution.

Last year, when the Bihar government decided to conduct a caste survey in the state, the BJP was also Nitish Kumar’s partner in the state government, and it supported it. Political expert and former professor of Tata Institute of Social Science, Pushpendra Kumar, says, “It is not that the BJP does not talk about caste. It tries to reveal the caste of the Prime Minister as well. For caste politics, the BJP also tried hard to raise the issue of Pasmanda Muslims.”

(The writer is a management professional based in Ahmedabad. Views personal.)

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