Interactive Timeline
Major developments in forensic science — from the first forensic texts to modern DNA and digital methods. Each milestone marks a shift in how evidence is understood and analyzed.
First recorded examination of wounds
The Roman physician Antistius examined Julius Caesar's stab wounds and noted which were fatal — an early example of medical analysis of injuries for investigative purposes.
Song Ci's 'Washing Away of Wrongs'
Chinese magistrate Song Ci wrote Xi Yuan Ji Lu, considered the first forensic text, covering wound examination, autopsy methods, and investigative reasoning.
The Marsh Test for arsenic
James Marsh developed a sensitive chemical test for arsenic, enabling detection of poisoning in tissues and helping launch forensic toxicology.
Bertillon's anthropometry
Alphonse Bertillon created a system of body measurements to identify repeat offenders — the first systematic identification method, later superseded by fingerprinting.
Faulds proposes fingerprint identification
Henry Faulds published a letter in Nature suggesting fingerprints could identify individuals and catch criminals by latent prints at scenes.
Galton's 'Finger Prints'
Francis Galton statistically established the uniqueness and persistence of fingerprints, providing the scientific basis for fingerprint identification.
First criminal conviction by fingerprint
In Argentina, Juan Vucetich's fingerprint system helped identify Francisca Rojas, the first recorded case solved by fingerprint evidence.
X-rays in forensics
Wilhelm Röntgen's discovery of X-rays soon enabled forensic radiology — detecting bullets, fractures, and identifying remains non-destructively.
Discovery of ABO blood groups
Karl Landsteiner's ABO blood-group system enabled early serology to include and exclude sources of bloodstains — a predecessor of modern DNA typing.
Locard's first crime lab
Edmond Locard founded a police crime laboratory in Lyon and articulated Locard's Exchange Principle — that every contact leaves a trace.
Goddard and firearms identification
Calvin Goddard advanced comparison microscopy of bullets and casings, establishing firearms identification as a discipline, notably in the St. Valentine's Day Massacre case.
First U.S. crime laboratory
The Los Angeles Police Department established the first U.S. police crime laboratory, formalizing scientific support for investigations.
FBI Crime Laboratory founded
The FBI opened its crime laboratory, becoming a national resource for forensic analysis and training.
Dental identification in the Ruxton case
Dental records and other forensic methods helped identify the dismembered remains in the Buck Ruxton case in the UK, a landmark for forensic identification.
DNA's double helix described
Watson and Crick's description of DNA structure laid the foundation for all later DNA-based identification.
Gas chromatography matures
Gas chromatography became a routine separation method, soon combined with mass spectrometry to create GC-MS — a backbone of toxicology and chemistry analysis.
AFIS development begins
Automated Fingerprint Identification Systems began development in the late 1970s, later transforming the speed and scale of fingerprint searching.
Alec Jeffreys invents DNA fingerprinting
Alec Jeffreys discovered patterns in DNA that could uniquely identify individuals, creating the technique he called 'DNA fingerprinting.'
Colin Pitchfork case
The first use of DNA profiling in a criminal case: it cleared an innocent suspect and identified Colin Pitchfork, demonstrating DNA's power to both convict and exonerate.
STR-based profiling developed
Short Tandem Repeat analysis became the basis of modern DNA profiling, enabling standardized, database-compatible profiles.
DNA in the O.J. Simpson trial
The televised trial brought DNA evidence and questions of collection, contamination, and handling to wide public attention, shaping forensic practice and perception.
CODIS becomes national
The FBI's Combined DNA Index System became a national database in the U.S., enabling cross-jurisdictional DNA matching.
Mobile device forensics emerges
As cell phones proliferated, examiners developed tools to image and analyze mobile devices, making digital forensics central to modern investigations.
NAS report on forensic science
The U.S. National Academy of Sciences report 'Strengthening Forensic Science in the United States' called for stronger validation, standards, and research across many pattern-evidence disciplines.
FBI reviews microscopic hair comparison
Reviews found that FBI microscopic hair comparison testimony had overstated the science in many cases, prompting reforms and underscored the need for caution in pattern evidence.
Golden State Killer identified by genetic genealogy
Investigators used public genealogy databases and family trees to identify a suspect in a decades-old case, launching the era of forensic genetic genealogy.
Probabilistic genotyping matures
Software for statistically interpreting complex, mixed DNA profiles became widespread — and the subject of active scientific and legal debate over assumptions and transparency.
Cloud and big-data digital forensics
As data moved to cloud services, digital forensics adapted to remote evidence, large datasets, and legal-access challenges across jurisdictions.
AI-assisted pattern recognition
Machine-learning tools began assisting with tasks like fingerprint and pattern analysis, raising both promise and questions about validation, bias, and explainability.
NIST focuses on forensic standards
NIST and standards bodies expanded work on validated methods, reference materials, and OSAC standards to strengthen the scientific basis of forensic disciplines.
