When a body is found and no one can immediately say who the person is, it enters a structured process that can last weeks, months, or even decades. Law enforcement, medical examiners, and forensic scientists work through a series of identification methods while the remains are stored, cataloged, and entered into national databases. As of December 2024, the FBI’s National Crime Information Center listed 8,546 unidentified person records still active in the United States alone.
The First Steps After Discovery
Once an unidentified body is reported, the local coroner or medical examiner takes custody of the remains. The body is transported to a morgue, where it must be refrigerated if not embalmed, typically within 24 hours. An autopsy is performed to determine cause of death, and investigators begin documenting everything that could help establish identity: physical characteristics, clothing, tattoos, scars, medical devices, and any personal belongings found nearby.
The vast majority of deceased people are identified through straightforward means, usually a family member visually recognizing them or a fingerprint match. But when decomposition, trauma, or fire has made the person unrecognizable, or when no one comes forward to claim them, forensic specialists move to more advanced techniques.
How Forensic Teams Try to Identify Remains
Identification follows a rough hierarchy. Fingerprints are fast and reliable when the skin is intact, and they can be run against criminal and civil databases almost immediately. When fingerprints aren’t available, dental records become critical. Comparing a person’s teeth, jaw structure, and dental work against existing patient records remains one of the most dependable methods in forensic pathology. A single distinctive filling or crown can confirm an identity.
DNA profiling serves as the next layer. A sample from the remains is analyzed and compared against reference samples, either from family members who have submitted their DNA or from profiles already stored in law enforcement databases. This process takes longer than fingerprints or dental comparisons, sometimes weeks or months depending on lab backlogs, but it provides near-certain identification when a match exists.
Beyond biology, investigators also build a profile of the person using estimated age, ancestry, height, and weight. Forensic artists may reconstruct what the person looked like in life, creating sketches or digital renderings that get distributed to the public in hopes someone recognizes them.
National Databases That Track Unidentified Cases
Every unidentified case generates records that feed into several overlapping federal systems designed to cross-reference missing persons with unidentified remains. The FBI’s National Crime Information Center (NCIC) is the backbone, a computerized index that allows criminal justice agencies across the country to rapidly exchange information. Users can search for potential matches between missing persons and unidentified bodies using physical descriptions and biometric data like fingerprints and dental records.
The FBI’s Combined DNA Index System (CODIS) stores DNA profiles and allows investigators to compare remains against its missing persons index, where family reference samples are uploaded. The Next Generation Identification (NGI) database, which stores fingerprint and other biometric records, has become one of the most significant tools for resolving these cases.
In 2007, the National Institute of Justice created the National Missing and Unidentified Persons System, known as NamUs. Unlike the law enforcement-only databases, NamUs was built to be a public-facing clearinghouse where families of missing people can search for their loved ones and compare details against unidentified cases. Since 2017, NamUs has partnered with the NGI database so that fingerprint records from both missing and unidentified persons can be cross-searched. For cases involving children, the National Center for Missing and Exploited Children operates its own database and leverages all of these systems to develop leads.
Genetic Genealogy Is Solving Cold Cases
A technique called forensic genetic genealogy has transformed how investigators approach cases that have gone cold for years or even decades. The method works by uploading a DNA profile from unidentified remains to public genealogy databases, then tracing family trees backward to narrow down who the person could be. It’s the same basic approach that identified the Golden State Killer in 2018, but applied to John and Jane Doe cases.
By the end of 2020, at least 439 cases had been resolved with investigative leads generated through forensic genetic genealogy, and the total has since grown to over 500. Some of these cases were decades old, involving remains that had sat in storage or been buried in unmarked graves long before the technology existed. The method is only used after traditional DNA database searches through CODIS have come up empty, making it a last resort that has proven remarkably effective.
Who Pays for All of This
The financial burden of handling unidentified remains falls primarily on local government. Counties and municipalities fund the autopsy, morgue storage, forensic testing, and eventual disposition of the body. For jurisdictions with limited budgets, this can be a real strain, especially when advanced DNA analysis or forensic genealogy is needed.
Federal grants help offset some costs. The Bureau of Justice Assistance runs a Missing and Unidentified Human Remains Program that can fund forensic testing and even the exhumation of previously buried remains when new identification methods become available. However, once a person is identified and their remains returned to family, federal funding cannot cover funeral or burial expenses. Families may instead be directed to victim compensation programs for that kind of assistance.
What Happens When No One Is Identified
After identification efforts stall, the body cannot be held in a morgue indefinitely. The timeline varies by jurisdiction, but at some point, local authorities must decide what to do with the remains. In some states, laws explicitly prohibit cremating unidentified human remains, which means burial is the only option. In other jurisdictions, cremation has become the default for both unidentified and unclaimed bodies because it costs less and doesn’t require dedicated land.
Historically, unidentified and unclaimed bodies were buried in what’s commonly called a potter’s field, a government-funded cemetery with rows of unmarked or minimally marked graves. These sites still exist across the country. In Spartanburg County, South Carolina, for example, more than 900 bodies are buried in the county potter’s field, most in unmarked graves covered by open grass. A few are marked with handmade signs, painted wooden posts, or chunks of concrete with names scratched into them.
But potter’s fields are disappearing. The land they require and the cost of maintaining them have pushed many counties toward cremation. In Spartanburg, the shift meant that unclaimed cremated remains are sealed in plastic containers and placed on shelves inside a secure underground vault. Families who eventually come forward can claim the ashes. If no one does, the remains stay in storage.
Even after burial or cremation, the case file stays open. DNA samples, dental records, and fingerprints remain in national databases, and advances in technology can reopen a case at any time. When forensic genetic genealogy or a new database match finally produces a name, authorities can exhume buried remains or retrieve stored cremains and return them to the person’s family. For some families, that moment of identification comes years or decades after their loved one went missing.