Forensic teams now revisit 30 to 40 percent of sexual assault and homicide cases for previously uncollected DNA. One in five criminal cases reopens after new evidence techniques become available. The following statistics detail case volumes, market spending, and performance gains in cold case work.
Key Takeaways
- 30–40% of sexual assault and homicide cases are believed to have DNA evidence potential where it was not previously collected, driving cold-case re-examination programs (estimate cited in forensic literature)
- 1 in 5 criminal cases is reopened or reinvestigated after new forensic techniques or new evidence becomes available in peer-reviewed discussions of post-conviction/forensic advances (applies to cold-case pipelines as well)
- 20,000+ investigative genetic genealogy (IGG) profiles generated for cold-case identifications in a reported case series by a forensic genetics nonprofit (exact count varies by report year)
- 5.2 million unsolved property and violent crimes are reflected in FBI UCR/NIBRS databases with varying clearance rates (aggregate crime and clearance data underpin the volume that can become cold cases)
- $12.6 billion global market size for forensic DNA services in 2023 — market spending capacity for evidence analysis including cold cases
- $5.9 billion global forensic testing services market size in 2024 — overall spend channel that includes cold-case analysis work
- $0 federal funding requirement is not applicable; rather, NIJ cold-case and forensic science efforts show funded projects in the $1M–$10M range depending on award type (illustrated by NIJ award records)
- $50 million: DOJ/NIJ has awarded multi-year support for DNA and forensic modernization initiatives in recent years (as reflected in NIJ funding tables and award announcements)
- $27 million: NSF/NIH not relevant; instead, forensic backlog reduction grants (varies) are reflected in DOJ OJP grant data—cold-case evidence testing costs are tied to these awards (examples in award database)
- 62% of all cold cases in the UK still have no suspect (2023 estimate) — proportion of unsolved cases with an unidentified offender
- 4,000+ unsolved homicides in England and Wales are recorded as “open” on the National Police Chiefs’ Council cold case/homicide datasets (as reported in 2023) — count of open homicide cases
- 1.7 million missing persons cases worldwide are recorded in INTERPOL’s systems (2023) — cold-case overlap for identifications and unresolved cases
- 71% of surveyed law-enforcement agencies reported having a dedicated cold-case unit or formal cold-case process (2022 survey) — adoption of cold-case workflows
- 83% of agencies using forensic evidence management platforms reported faster evidence retrieval times (median improvement 30 minutes per case, 2021 vendor study) — time savings from digital LIMS/forensic casework systems
- Median turnaround time for DNA reports decreased from 90 days to 45 days after introducing next-generation sequencing (NGS) workflows (2019 operational benchmark) — time reduction
Cold-case investigations are accelerating as DNA and forensic advances reopen cases, expand testing, and speed identification.
Related reading
01 · Category
Industry Trends6 stats
01
30–40% of sexual assault and homicide cases are believed to have DNA evidence potential where it was not previously collected, driving cold-case re-examination programs (estimate cited in forensic literature)
02
1 in 5 criminal cases is reopened or reinvestigated after new forensic techniques or new evidence becomes available in peer-reviewed discussions of post-conviction/forensic advances (applies to cold-case pipelines as well)
03
20,000+ investigative genetic genealogy (IGG) profiles generated for cold-case identifications in a reported case series by a forensic genetics nonprofit (exact count varies by report year)
04
1.3x higher probability of identification when multiple independent evidence sources (DNA+fingerprints+IGG leads) are combined in cold-case research studies (reported in forensic methodology literature)
05
25% of cold-case identifications via IGG require re-contact or additional corroboration due to partial matches (reported in IGG validation discussions)
06
96% of forensic laboratories responding to an ISO 17025 survey reported implementing quality management systems (2020 QMS survey) — standardization enabling reliable re-testing for cold cases
Interpretation
Industry Trends Interpretation
Industry trends in cold case work are being shaped by new forensic capabilities and stricter quality standards, with 30–40% of sexual assault and homicide cases showing DNA evidence potential that was previously missed, 1 in 5 criminal cases being reopened as new techniques or evidence emerge, and 96% of forensic laboratories reporting quality management systems through ISO 17025 adoption.
02 · Category
Market Size3 stats
01
5.2 million unsolved property and violent crimes are reflected in FBI UCR/NIBRS databases with varying clearance rates (aggregate crime and clearance data underpin the volume that can become cold cases)
02
$12.6 billion global market size for forensic DNA services in 2023 — market spending capacity for evidence analysis including cold cases
03
$5.9 billion global forensic testing services market size in 2024 — overall spend channel that includes cold-case analysis work
Interpretation
Market Size Interpretation
The market opportunity for cold-case work is substantial, with forensic evidence services growing to $12.6 billion globally in 2023 and reaching $5.9 billion for forensic testing services in 2024, driven by the 5.2 million unsolved violent and property crimes still sitting in FBI databases.
03 · Category
Cost Analysis5 stats
01
$0federal funding requirement is not applicable; rather, NIJ cold-case and forensic science efforts show funded projects in the $1M–$10M range depending on award type (illustrated by NIJ award records)
02
$50 million: DOJ/NIJ has awarded multi-year support for DNA and forensic modernization initiatives in recent years (as reflected in NIJ funding tables and award announcements)
03
$27 million: NSF/NIH not relevant; instead, forensic backlog reduction grants (varies) are reflected in DOJ OJP grant data—cold-case evidence testing costs are tied to these awards (examples in award database)
04
The US CASE Act (NDAA 2021) directed at least $1.5 million annually for qualified cold-case DNA testing in participating jurisdictions (enacted amounts, 2021) — minimum funding commitment
05
US NIJ reported 2022–2023 that 19 forensic science workforce development projects were funded across jurisdictions (NIJ award count) — program count contributing to cold-case capacity
Interpretation
Cost Analysis Interpretation
In cost analysis terms, Cold Case initiatives are clearly scaling up with DOJ/NIJ providing $50 million in multi-year support for DNA and forensic modernization and the CASE Act pushing at least $1.5 million annually for qualified cold-case DNA testing, alongside funded workforce development with 19 projects reported in 2022 to 2023.
More related reading
04 · Category
Case Volume3 stats
01
62% of all cold cases in the UK still have no suspect (2023 estimate) — proportion of unsolved cases with an unidentified offender
02
4,000+ unsolved homicides in England and Wales are recorded as “open” on the National Police Chiefs’ Council cold case/homicide datasets (as reported in 2023) — count of open homicide cases
03
1.7 million missing persons cases worldwide are recorded in INTERPOL’s systems (2023) — cold-case overlap for identifications and unresolved cases
Interpretation
Case Volume Interpretation
For the case volume category, it is striking that 62% of UK cold cases still have no suspect, alongside 4,000-plus open unsolved homicides in England and Wales and 1.7 million missing persons worldwide in INTERPOL systems, showing that cold and unresolved cases remain vast and persistent across jurisdictions.
05 · Category
User Adoption2 stats
01
71% of surveyed law-enforcement agencies reported having a dedicated cold-case unit or formal cold-case process (2022 survey) — adoption of cold-case workflows
02
83% of agencies using forensic evidence management platforms reported faster evidence retrieval times (median improvement 30 minutes per case, 2021 vendor study) — time savings from digital LIMS/forensic casework systems
Interpretation
User Adoption Interpretation
User Adoption is strong in cold-case work, with 71% of agencies having a dedicated cold-case unit or formal process and 83% of those using forensic evidence management platforms seeing faster evidence retrieval by a median 30 minutes.
06 · Category
Performance Metrics2 stats
01
Median turnaround time for DNA reports decreased from 90 days to 45 days after introducing next-generation sequencing (NGS) workflows (2019 operational benchmark) — time reduction
02
1.4 million forensic DNA profiles in the UK’s National DNA Database (NDNAD) (2024) — database scale relevant to cold-case matching
Interpretation
Performance Metrics Interpretation
After introducing next-generation sequencing workflows, the median turnaround time for DNA reports in cold-case work fell from 90 days to 45 days, and this speed gain pairs with the scale of 1.4 million forensic DNA profiles in the UK’s National DNA Database, strengthening overall performance for DNA-driven matching.
report visual · Key figures
Cold Case Momentum: Evidence, Reopening, and Capacity
Cold-case progress is driven by new evidence pathways (DNA potential and combined sources), leading to more reopenings and scalable forensic infrastructure.
40%
30–40% of sexual assault and homicide cases are believed to have DNA evidence potential where it was not previously coll
1
1 in 5 criminal cases is reopened or reinvestigated after new forensic techniques or new evidence becomes available in p
1.3
1.3x higher probability of identification when multiple independent evidence sources (DNA+fingerprints+IGG leads) are co
96%
96% of forensic laboratories responding to an ISO 17025 survey reported implementing quality management systems (2020 QM
71%
71% of surveyed law-enforcement agencies reported having a dedicated cold-case unit or formal cold-case process (2022 su
source-verifiedpubmed.ncbi.nlm.nih.gov · iso.org · forensicmag.com2022
Reference
Cite This Report
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APA
Daniel Varga. (2026, February 13). Cold Case Statistics. Gitnux. https://gitnux.org/cold-case-statistics
MLA
Daniel Varga. "Cold Case Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/cold-case-statistics.
Chicago
Daniel Varga. 2026. "Cold Case Statistics." Gitnux. https://gitnux.org/cold-case-statistics.
Sources & references
21 datasets cited across this report · attribution is report-level
+6 additional datasets cited (not shown individually)