The field of forensic science has seen an amazing development due to the fast advancement in technology. The conventional methods of forensics are still significant, but with the help of modern technology tools, advanced imaging, molecular biology, and other digital tools, the efficiency of analysing evidence in forensic laboratories has been improved.
Modern forensic laboratories in some of the best forensic science colleges in Nashik tend to apply techniques that are much faster and less prone to mistakes because of being automated. Below is the list of some of the most exciting emerging technologies affecting the future of forensic science.
- Machine Learning & Artificial Intelligence
Artificial Intelligence (AI) and Machine Learning (ML) have turned into some of the most effective approaches to be used in forensics. Such AI-based systems are capable of processing vast amounts of data and recognising patterns in them.
Applications in forensic laboratories:
- Automated fingerprint recognition and comparison
- Facial recognition and image analysis
- Firearm and toolmark comparison
- Handwriting and questioned document examination
- DNA mixture interpretation
- Crime-scene image analysis
- Digital evidence classification
- Predictive analysis of large forensic databases
The machine learning algorithm can help forensics specialists by ranking potential matches and emphasising particular areas that need further scrutiny. Nevertheless, the results produced by the AI algorithm must be usually considered supporting data, not something that replaces the opinion of the expert.
- Next-Generation DNA Sequencing
The DNA profiling method normally involves certain genetic markers. With the advent of next-generation DNA sequencing (NGS), scientists can analyse more genetic information at once.
NGS has potential applications in:
- Identification of highly degraded biological samples
- Analysis of complex DNA mixtures
- Mass disaster victim identification
- Forensic ancestry analysis
- Prediction of externally visible characteristics
- Microbial and environmental DNA analysis
An example of an advancement in this area is forensic investigative genetic genealogy, whereby genetic data can be combined with genealogical databases to create investigative clues. This technology calls for much consideration regarding privacy, consent, legal jurisdiction, and ethics.
- Rapid DNA Technology
Rapid DNA systems are designed to automate several stages of DNA analysis with minimal human intervention. Traditional DNA analysis may require laboratory processing over several hours or days. There is the potential for Rapid DNA to generate DNA profiles very quickly, especially where standard samples are used.
Possible uses are:
- Victim identification in disasters
- Missing persons investigations
- Criminal investigations
- Human identification
- Certain law-enforcement identification processes
The technology is particularly valuable when rapid identification is important.
- Advanced Mass Spectrometry
Mass spectrometry is an indispensable method of analysis for forensic toxicology, drugs analysis, etc.
- State of the art systems, including:
- Liquid-Chromatography / Mass-Spectrometry
- Gas-Chromatography / Mass-Spectrometry
HRMS – high resolution mass spectrometry is able to detect and identify tiny amounts of different substances.
These systems are especially useful for detecting the presence of:
- Drugs and metabolites
- New psychoactive substances
- Poison
- Pharmaceuticals
- Explosive and their remnants
- Unknown substances
High resolution mass spectrometry is especially valuable when it comes to non-targeted screening, when researchers are able to look for any unknown substances, instead of pre-selected ones.
- 3D Crime Scene Scanning and Reconstruction
Modern 3D scanning technologies make a great contribution to the process of documenting crime scenes. Thanks to 3D laser scanners, structured light scanners, photogrammetry and LiDAR-based systems, investigators are able to:
- Preserve the spatial arrangement of a scene
- Take accurate measurements
- Examine evidence locations virtually
- Reconstruct accident or crime sequences
- Perform trajectory and bloodstain-pattern analyses
- Present complex evidence in court
A major advantage is that investigators can return to the digital reconstruction later without physically accessing the original scene.
- Forensic Imaging and Advanced Microscopy
Forensic science labs rely on modern imaging systems to analyse evidence in the microscopic and sometimes nanoscopic scale.
Such systems include:
- Scanning Electron Microscope
- Transmission Electron Microscope
- Atomic Force Microscope
- Con-focal microscopy
- Hyper spectral imaging
- 3D microscopy
For instance, SEM used together with Energy Dispersive X-ray Spectroscopy (SEM-EDS/EDX) allows for obtaining morphological and elemental information about samples, like glass, paint, soil, metal, and gunshot residue.
- Hyperspectral Imaging
Hyperspectral imaging involves imaging combined with spectroscopy. As opposed to imaging that involves gathering information on the visible colours of the objects, hyperspectral imaging involves obtaining information from different wavelengths of the electromagnetic spectrum.
This technology can assist in the examination of:
- Documents and inks
- Paint and pigments
- Biological stains
- Fibres
- Drugs
- Trace materials
- Altered or obliterated writing
Various materials might have their unique spectrum signature; hence forensic experts can use this technique to distinguish between various materials that look alike.
- Raman and FTIR Spectroscopy
Modern spectroscopic techniques including Raman spectroscopy and FTIR spectroscopy have become extremely important when it comes to chemical analysis. Raman Spectroscopy is a technique that is capable of detecting the molecular composition of a substance and useful in analysing:
- Drugs
- Explosives
- Paints
- Pigments
- Fibres
- Minerals
- Unknown trace materials
FTIR:
FTIR provides information about the molecular bonds present in a material and is widely used in:
- Paint analysis
- Polymer identification
- Fibre examination
- Drug analysis
- Adhesive examination
- Unknown-material identification
The combination of spectroscopy with advanced databases and chemometric software can further improve identification and classification.
- Forensic Toxicology with the Help of Highly Sensitive Analytical Tools
The development of highly sensitive analytical tools has greatly improved the field of forensic toxicology. With the aid of the following technologies, it is possible to investigate the presence of minute amounts of substances:
- LC-MS/MS
- GC-MS
- High-resolution mass spectrometry
- Immunoassay screening
- Headspace GC-MS for volatile substances
Such technologies are especially needed when working with the cases that include new psychoactive substances, designer drugs, pharmaceutical poisoning, and mixed drugs.
- Digital and Cloud Forensics
The growing use of cell phones, computers, cloud computing, Internet of Things, and social media has rendered digital evidence an essential component of investigations today. A digital forensic lab can examine the following evidence with the help of specialised techniques:
- Smartphones
- Computers
- Cloud accounts
- Internet activity
- Emails
- Social network accounts
- GPS location data
- Digital photos and videos
- IoT devices
- Evidence related to cryptocurrency
It is difficult to perform cloud forensics since the evidence is often located in different jurisdictions. It requires special techniques to acquire, preserve, authenticate and analyse it.
- Blockchain and Cryptocurrency Forensics
Another technological development has caused both difficulties and opportunities for forensic investigators. Cryptocurrency transactions are registered on blockchain that creates additional digital evidence. Cryptocurrency forensic methods are helpful in the investigation in order to:
- Trace transactions
- Identify transaction patterns
- Link wallet addresses with investigative information
- Investigate financial flows
- Detect suspicious transactions
- Facilitating criminal investigation related to cybercrime and fraud
While blockchain-based records are extremely traceable, identifying the actual person associated with the specific wallet still demands additional investigative efforts.
- Field and Portable Forensic Devices
Forensic science is getting closer and closer to the scene of a crime. The following portable devices are being used today:
- Portable Raman spectrometers
- Hand-held XRF
- Portable FTIR
- Portable mass spectrometers
- Digital microscopes
- Crime-scene imaging devices
Using such devices allows one to gather preliminary data without transferring all the samples immediately to the lab.
- Robotic Devices and Laboratory Automation
Automated equipment becomes more and more common in today’s forensic labs. A robot can help one with:
- DNA extraction
- Sample preparation
- Liquid handling
- Device loading
- Evidence tracking
- High-throughput analysis
Such technology reduces human error and contamination.
- Advanced Fingerprint Technologies
Fingerprint examination is moving beyond conventional powder and chemical development methods. Emerging approaches include:
- Automated fingerprint identification systems
- Advanced image enhancement
- 3D fingerprint imaging
- Chemical imaging
- Spectroscopic fingerprint analysis
- AI-assisted fingerprint comparison
Scientists have also explored means by which latent fingerprints can be detected via chemical elements like amino acids and lipids and others, which might make detection possible for those prints that would be hard to detect through conventional means.
- Forensic Proteomics
It is not the only biological material used for investigation. Proteomics is related to proteins and can give additional information when there is no DNA available. Forensic proteomics is being investigated for:
- Body-fluid identification
- Human identification
- Tissue identification
- Age-related biological information
- Species identification
- Characterisation of biological evidence
Mass spectrometry plays a major role in modern forensic proteomic research.
- Microbiomes and Microbial Forensics
Every individual comes into contact with distinct microbiome communities. Possible uses include:
- Human identification
- Body-fluid characterisation
- Geolocation research
- Postmortem investigations
- Linking individuals or objects to environments
This field is still developing, and the reliability, stability, population variability, and interpretation of microbial signatures remain important research questions.
- Forensic Genetic Phenotyping
Forensic genetic phenotyping attempts to use DNA information to provide investigative clues about certain externally visible or biogeographical characteristics.
Research has examined genetic contributions to characteristics such as:
- Eye colour
- Hair colour
- Skin pigmentation
- Certain ancestry-related characteristics
These methods may assist investigations when no conventional DNA database match is available. However, they have important scientific, ethical, privacy, and legal limitations and should not be interpreted as producing an exact description of an individual.
- Chemometrics and Big Data Analytics
Modern forensic instruments generate enormous amounts of analytical data. Chemometrics uses mathematical and statistical techniques to extract useful information from these complex datasets.
Applications include:
- Classification of drugs
- Differentiation of paint samples
- Comparison of glass
- Soil classification
- Spectral interpretation
- Analysis of explosive residue
- Pattern recognition
Big data approaches will allow forensic labs to work with large fingerprint, DNA, toxicology, and other database evidence.
- Virtual Reality and Augmented Reality
Forensic science, crime scene reconstruction, and court presentations are new ways of learning through the application of virtual reality and augmented reality technologies. It is possible to convert a 3D crime scene into a virtual one allowing the investigation of the crime scene from any perspective by investigator, learner, lawyer, or judge.
The areas of application can include:
- Crime scene reconstruction
- Forensic learning
- Accident reconstruction
- Courtroom visualisation
- Scenarios of investigation
- Digital Twins and Intelligent Crime Scene Reconstruction
Digital twins are highly detailed virtual replicas of an object or a physical environment. This technology can be implemented in forensic science to generate intelligent digital twins of:
- Crime scene
- Vehicle
- Building
- Object in accident
- Complex forensic evidence
Combining this technology with AI, 3D scanning, physics modelling, and spatial data, such solutions will offer increasingly advanced methods of event reconstruction.
Conclusion
The field of forensic science is developing very rapidly due to the introduction of artificial intelligence, DNA techniques, advanced analytical equipment, digital forensics, automation, and three-dimensional crime scene reconstruction technology. These technologies have helped increase the speed, precision, and efficiency of the evidence analysis process as well as analyse more complicated types of evidence.
Nevertheless, the development of new technology by professionals holding a B.Sc in Forensic Science and Criminology should always go hand in hand with its proper validation, quality control, interpretation, and taking into account ethical, legal, privacy and reliability concerns. The use of AI and other technologies should aid forensic experts in their work, but not substitute for their judgment and skills. As digital twins, AI, microbiome research, forensic genetic phenotyping, big data analytics, and other technologies keep developing, they will probably become an integral part of evidence analysis and crime scene reconstruction.