Genetic Genealogy Helps Crack 1993 Granite City Murder Case
Othram used relatives' DNA to point Madison County detectives to a male family member in the decades-old killing of Randy Gail Sperino
By AXY Business Desk ·
Key points
- Madison County, Illinois, detectives sent evidence from the 1993 killing of Randy Gail Sperino to Othram, which used relatives' DNA to identify a male family member.
- Captain Tim Lawrence of the Madison County Sheriff's Office said the lead broke the case open.
- Investigative genetic genealogy looks for distant relatives, which can help where standard database searches find no match.
- The method, first widely used in the 2018 Golden State Killer case, raises privacy concerns about how relatives' genetic information is used.
Investigators in Madison County, Illinois, say a DNA technique that searches for relatives of an unknown suspect has produced the first real lead in the 1993 killing of Randy Gail Sperino, a case that went three decades without a name. Detectives sent genetic evidence to Othram, a Houston-based company, which used DNA profiles submitted by the suspect's extended relatives to identify a male family member. "That lead broke the case open," said Captain Tim Lawrence of the Madison County Sheriff's Office, the agency responsible for investigating the crime.
The source material does not say whether the man has been named, charged or ruled in or out. It does not say when the sheriff's office expects to make a public announcement, or what the next step in the investigation will be. What it does make clear is that a method first used to catch a notorious California killer nearly a decade ago is now being applied to older cases in the American Midwest, including a killing from 1993 in a small city across the river from St. Louis.
The night Randy Gail Sperino disappeared
Randy Gail Sperino was 34 years old. She was last seen alive on the evening of 9 November 1993, as she was getting into a pickup truck in Granite City, Illinois. Her body was found hours later in a field nearby. She had died from blunt force trauma, a term used for injuries caused by a hard impact rather than a cut or a bullet.
For the people who knew her, the case has meant decades of not knowing who was responsible. The killer was a mystery from the start. Investigators could not name a suspect, and the case stayed on the books as a homicide with no one to charge.
The case is not unusual. The source material notes that there are more than 250,000 unsolved homicides in the United States. Many of those files share the same basic problem. Police have a body, a scene and some biological evidence, but no suspect to compare it against. Each year that passes can make it harder to find witnesses, and the people who worked the original case may retire or die before a breakthrough arrives.
Why a standard DNA search found nothing
Most criminal DNA testing works by comparison. A laboratory takes a sample from a crime scene and checks it against profiles already stored in government databases. In the United States, that system is known as CODIS, the Combined DNA Index System, which is run by the FBI and links DNA profiles from crime scenes and convicted offenders across the country.
A match usually happens only when the person who left the DNA is already in the system. That generally means they were arrested or convicted of a crime at some point. If the person responsible for a killing never came to police attention, their profile would not be in the database, and the search would come back empty.
That is what happened in Granite City. DNA found at the scene was tested against standard law enforcement databases, but no matches were found. The evidence was not useless. It simply had nothing to match against, and for the next three decades investigators from the Madison County Sheriff's Office chased leads and interviewed hundreds of people without finding the person who left it.
How the Golden State Killer case changed the method
The Madison County detectives were inspired by a case from 2018. Investigators used a technique known as investigative genetic genealogy to identify Joseph James DeAngelo, who became known as the Golden State Killer. The team did not rely on a direct match to DeAngelo's own DNA. Instead, they built a family tree using DNA data that relatives had provided to commercial databases, similar to the consumer ancestry platforms many people use to trace their roots.
DeAngelo was arrested in April 2018. He later pleaded guilty to multiple killings. The case showed police and forensic scientists that old evidence could be useful again, and that a suspect did not have to be in a criminal database for investigators to find him.
The method works differently from a traditional search. Traditional forensic DNA testing generally relies on a direct comparison between evidence and a known person. Investigative genetic genealogy can identify distant genetic relatives of an unknown individual. Two people who share a great-grandparent, for example, share a measurable amount of DNA. If enough of a suspect's relatives appear in a database, investigators can start to rebuild a family tree and narrow down who fits.
How Othram worked the Sperino case
Last year, the Madison County detectives decided to try the approach on their own case. They sent the genetic evidence from the Sperino killing to Othram, a Houston-based company that uses DNA technology to help identify the perpetrators in both cold and current crime cases.
The killer's own DNA profile was not available to investigators. That made a direct search impossible. Instead, Othram worked with profiles that had been submitted by his extended relatives, such as cousins and other family members who had taken DNA tests. Those profiles allowed the company to identify a male family member, and that lead became the turning point in a case that had stalled for thirty years.
A lead like this is a starting point, not a conclusion. A family connection points investigators in a direction, but it does not by itself prove who committed a crime. In general, police need to confirm the link, rule out other people and collect material that can stand up in court before anyone can be charged. The source material does not describe those steps in this case, so it is not clear how far the investigation has progressed.
The privacy question
The source material points to a wider worry. Investigative genetic genealogy can help hunt down criminals, but it raises concerns about privacy.
Many people send their DNA to a consumer ancestry service to learn about their family history. They may not expect that the information could later help police track down a relative they have never met, or a relative who has done something wrong. The method means that one person's decision to take a DNA test can reveal something about the people they are related to, even if those relatives never agreed to take part in a criminal investigation.
That tension is likely to shape the public debate. Supporters point to cases like Sperino's, where a family waited decades for answers. Critics ask who should be allowed to search these databases, under what rules and with what oversight. Those questions are still open, and the source material does not describe any new rules or legal changes tied to this case.
What happens next
Analysts who follow forensic science expect investigators in other unsolved cases to look more closely at this method. That could mean more cold case files being sent for genetic analysis, and more families hearing that a case has been reopened. It could also mean more pressure on lawmakers and regulators to set clear limits on how these searches are conducted and who can see the results.
For the Sperino case, the next steps matter most to her family and to Madison County. Readers should watch for whether the sheriff's office names the man identified by the lead, whether any charges are filed, and whether the investigation produces DNA or other evidence that can confirm who killed Sperino in 1993. Any of those developments would show whether a family tie found through relatives' DNA can carry a case all the way to a courtroom.
For now, the story shows how a technique that first drew attention through a single famous case is moving into ordinary police work. It also shows how long the people closest to a crime can wait for an answer, and how much is still unknown about the man police now believe may be connected to it.
Questions and answers
What is investigative genetic genealogy?
It is a DNA technique that looks for distant relatives of an unknown suspect rather than an exact match. Investigators use those relatives' profiles to build a family tree and narrow down who fits.
Who was Randy Gail Sperino?
Randy Gail Sperino was 34 years old when she was last seen alive on the evening of 9 November 1993, getting into a pickup truck in Granite City, Illinois. Her body was found hours later in a nearby field, and she had died from blunt force trauma.
How did Othram help solve the Sperino case?
Detectives sent genetic evidence from the case to Othram last year. Because the killer's own DNA profile was not available, the company used profiles submitted by his extended relatives to identify a male family member. Captain Tim Lawrence of the Madison County Sheriff's Office said that lead broke the case open.
Why is this method raising privacy concerns?
The source material says investigative genetic genealogy raises worries over privacy. Many people submit DNA to consumer ancestry services for family history, and may not expect that their relatives' information could later be used in criminal investigations.
Topics: Investigative genetic genealogy, Othram, Madison County Sheriff's Office, Randy Gail Sperino, Granite City, Illinois, Cold cases, DNA forensics, Genetic privacy
Sources: BBC Business RSS
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