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For law enforcement, legal professionals, criminologists, and forensic experts, the rise of new technologies is set to radically change the field of forensic science. These innovations will greatly enhance the likelihood of capturing and convicting criminals, aiding investigators in solving cases involving missing persons, cold cases, sexual assaults, and murders.
While concerns about privacy violations have raised debates regarding the use of these technologies, it is evident that these ten groundbreaking innovations offer substantial benefits to law enforcement, victims, their families, and society at large.
10. Facial Recognition Technology
Smartphones and mobile devices equipped with facial recognition software are capable of identifying individuals under optimal conditions, such as when a high-quality image is available for comparison in real time. However, these ideal conditions often don’t apply in real-world scenarios. For instance, a person’s appearance may change over time, or accessories like sunglasses and facial hair can obstruct a successful identification. Although video footage offers a sequence of images, theoretically increasing the chance for identification, this isn’t always the case—as shown in the Boston Marathon bombing investigation. In a test of three facial recognition systems, only one correctly identified Dzhokhar Tsarnaev, and none recognized Tamerlan Tsarnaev, who wore sunglasses.
Animetrics may have a solution to these issues. The company has created software that can instantly convert 2-D images into simulated 3-D representations of a person's face. Users can modify the suspect's posture or angle, and the resulting headshot can be analyzed by any facial recognition algorithm. On high-powered laptops, the image can be cross-referenced with up to one million faces. However, for smartphones, the algorithms must be simplified, which reduces their effectiveness. Experts believe that the constraints of smartphones will be overcome in the future by leveraging cloud computing, allowing the technology to fit into the hands of law enforcement officers and enabling rapid identification of suspects.
9. Fingerprint Identification
While computers streamline the process of searching fingerprint databases for potential matches to crime scene prints, it is the analyst who ultimately decides whether a print is of sufficient quality to confirm a match. If the print isn’t in the database, no match can be made, regardless of the quality of the fingerprint from the scene. Even if a match isn’t found, or if two analysts disagree about a potential match, the fingerprint can still hold significant evidentiary value.
Annemieke van Dam from the University of Amsterdam’s Academic Medical Center observes that fingerprints contain “proteins and fats secreted from our skin,” which “could reveal a range of information about the person who left them,” such as their diet. Looking ahead, van Dam suggests that fingerprints may one day indicate whether the person is a meat-eater or a vegetarian.
Other studies have shown that fingerprints can reveal whether the person who left them behind handled a condom, and even identify the brand. Van Dam is confident that such detailed fingerprint analysis will become routine in the future. Furthermore, the DNA contained in fingerprints could eventually be used to create a suspect's “genetic profile,” offering investigators clues about their physical characteristics.
8. Predicting Hair and Eye Color
A forensic technique known as phenotyping enables investigators to predict a suspect’s hair and eye color, meaning law enforcement doesn’t always have to rely on whether the person’s DNA is already stored in a database. The HIrisPlex system utilizes 24 DNA variants related to hair and eye color and six genetic markers to make predictions. It can predict blonde hair with 69.5% accuracy, brown hair 78.5% of the time, red hair 80%, and black hair 87.5%.
The system can also distinguish between brown-eyed, black-haired individuals of European and non-European descent in 86% of cases. Tests show that geographic ancestry does not affect the results. While not yet commonly used, this tool is likely to become a key resource in forensic investigations soon.
7. Microbiome-Based Identification
Countless microscopic organisms live on and inside our skin and hair. In the future, these microbial communities, known as microbiomes, may assist in tracking down criminals. Although microbiomes outnumber our own cells by a ratio of 20 to one, no two people have the same microbiome, and these communities remain relatively stable over time, with the exception of after sexual activity.
Even if pubic hair recovered from sexual assault suspects lacks the roots containing the suspect’s DNA, the microbial DNA in the hair can still help link the suspect to the crime. The microbial communities present on pubic hair differ between men and women. These unique microbiomes can identify an individual, as they are specific to each person. After sexual intercourse, the microbiomes from both the male and female parties tend to mix, making their normally distinct microbial communities resemble each other, providing further evidence that a sexual act took place between the particular individuals.
While this groundbreaking technology isn’t yet ready for courtroom use due to the need to demonstrate that it has low false positive and false negative rates, experts predict it will soon become a standard tool for convicting sexual assault offenders, offering investigators and prosecutors a powerful new method to fight sexual violence.
6. Tattoo Identification
Challenges in crime investigations have arisen from relying on poor-quality tattoo images captured by security cameras, suspects using disguises, and overuse of keyword searches in databases. TattooID, an innovative new program, is helping to resolve these issues.
This software is highly effective because it identifies key points—what are called ‘essential common points’—between a tattoo image in a database and the image of a suspect’s tattoo from a surveillance video or police photo. This approach is similar to how other software programs match fingerprints. Additionally, it could help identify gang members, who often share a common tattoo design.
5. Morphometric Analysis
In the future, morphometrics (the study of body shapes) could be used to identify the skeletal remains of missing children, a task that is currently very difficult for forensic experts. This advancement comes from the recent discovery that, according to Associate Professor Dr. Ann Ross from North Carolina State University’s anthropology department, “Children’s faces reach their adult shape much earlier than previously believed.”
The shape of a skull allows anthropologists to distinguish between different geographic population groups. Now, scientists can apply this technique to younger individuals than ever before. In one instance, Ross was able to identify the Mesoamerican origin of a ten-year-old boy’s remains, making it possible to reconstruct his face. Previously, it was thought that only the skeletal remains of individuals aged 18 or older could be identified.
4. Virtual Autopsy
For various religious, personal, or other reasons, some spouses or families may refuse to allow an autopsy on their murdered loved one, even if the procedure could offer crucial information for identifying the killer. While courts typically override such decisions, forcing the autopsy, this can deepen the emotional distress of the family members.
In the future, physical autopsies may become obsolete with the advent of virtual autopsies. These non-invasive procedures do not harm the body or the forensic evidence. Instead of traditional methods, 3-D models are used, and the data is acquired by computers, allowing for immediate second opinions if needed. Though still expensive, the cost of virtual autopsies is expected to decrease as their use becomes more common. Once performed, virtual autopsies are always accessible.
In cases involving bite marks, 3-D images from virtual autopsies can be compared with a suspect’s dental records (if available), helping prosecutors gain a clearer understanding of the victim's injuries. Dr. Michael J. Thali, professor and chair of the Institute of Forensic Medicine at the University of Zurich, believes virtual autopsies will become “the gold standard in future forensic evidence examination.”
3. Mobile Crime Labs
Forensic scientist Peter Massey explains, “The goal [of forensic science research] is to bring the laboratory out to the crime scene.” With portable forensic labs, there will be no need to send specimens or data to distant facilities. This will allow for immediate test results, eliminating the delays currently caused by waiting for lab results.
A variety of innovative techniques are emerging to aid in the next generation of field forensics. For instance, Raman spectroscopy enables field investigators to quickly determine if a suspicious powder is an explosive, thus eliminating the need for bleach, which could ruin both the substance and potential evidence. For years, forensic labs relied on large, cumbersome equipment to identify drugs using gases, liquids, and solids, but now Fourier Transform Infrared (FTIR) spectroscopy can achieve the same results more efficiently, without the use of such materials.
Portable 'electronic sniffers' could soon replace canine units for drug detection, while 'flashlight detectors' might take over for breathalyzers and field sobriety tests in alcohol-related incidents. Near-infrared light scanners that image human veins might also assist law enforcement in identifying suspects. Additionally, portable forensic labs may be equipped with devices capable of sending facial recognition and fingerprint scan data directly to government databases for comparison with stored records.
These technologies are already being utilized by the FBI and several states, as Peter Massey mentioned, but their widespread use is expected to increase in the future. Massey’s presentation at the University of New Haven’s Marvin K. Peterson Library was complemented by librarian Hanko Dobi’s agreement that 'It’s remarkable how the crime scene is now evolving into the actual laboratory.'
2. Vehicle Systems Forensics
When drivers or passengers use their smartphones in a vehicle, the car or truck retains data from these devices even after they’ve been disconnected from the infotainment system. Information such as phone calls, contacts, and SMS messages sync directly to the vehicle. Additionally, when using a cable file system, metadata including file names, time stamps, and other data are also stored, even if the user denies access to such information.
Thanks to nearly 70 interconnected electronic control units (ECUs) dispersed throughout vehicles, crucial data such as the timing and location of a car door’s opening, as well as information about airbags, seat belts, and taillights, is continuously gathered and stored. This makes vehicles vulnerable to remote control. ECUs also manage vital functions like acceleration and braking. This wealth of information, now and in the future, will offer valuable forensic evidence against criminals, revealing travel routes, phone call and text message exchanges, website visits, door opening times, and instances of acceleration or deceleration. In high-speed chases, police could even remotely take control of a suspect's vehicle.
1. Pollen Biomarkers
Palynology, the study of pollen, has emerged as a promising new discipline in forensic science. Pollen can be found everywhere flowering plants grow, from deserts to caves, with flowers blooming at distinct times. These two factors create a unique 'signature' for pollen grains, making them useful as biomarkers linked to specific locations and periods.
A newly developed technique for identifying pollen will open the door for palynology to help solve crimes that may have otherwise remained unsolved. Although pollen has already assisted in determining the location of death for bodies found in mass graves in Bosnia, and helped link a robber to his crime in New Zealand, it hasn’t been widely used in criminal investigations. However, it could be beneficial in missing persons cases and tracking a criminal's movements.
The field is limited by a lack of full-time palynologists (with only one working in the U.S.) and the sheer volume of flower species (approximately 400,000) worldwide, which makes identification challenging. However, the use of DNA barcoding and sequencing, although costly, can enhance the precision of pollen identification, and it’s likely that pollen biomarkers will become a crucial tool in forensic science in the future.
