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Unsolved Cases: What They Are and How You Can Help
Unsolved cases grip the public imagination for a reason. Every year, thousands of homicides and disappearances go without resolution, leaving families suspended in grief and communities without answers. The formal term for these investigations is “cold cases,” defined by law enforcement as cases that have gone inactive due to a lack of leads, though many remain officially open. The number of unsolved murders in the US runs into the hundreds of thousands when you account for decades of backlogged investigations. This article breaks down how notable unsolved cases are selected, profiles landmark examples, and explains exactly how you can help move them forward.
Table of Contents
- Key takeaways
- 1. How we select which unsolved cases to highlight
- 2. Five landmark unsolved cases worth knowing
- 3. Comparing these cases at a glance
- 4. How you can actively help with unsolved cases
- 5. Technology and collaboration driving breakthroughs
- My honest take on public involvement
- Explore and contribute through Crimesolverscentral
- FAQ
Key takeaways
| Point | Details |
|---|---|
| Cold cases stay open | Many unsolved homicides remain technically active and can be reopened with new evidence. |
| Quality tips matter most | Structured, specific tips using who/what/when/where/how give investigators the most to work with. |
| Volunteers play a real role | Formal volunteer programs with proper onboarding have helped defrost cases once considered hopeless. |
| Technology is changing outcomes | DNA advances and searchable public databases are reopening cases closed for decades. |
| Public platforms connect the dots | Databases like Crimesolverscentral catalog over 264,913 cases and make them searchable by state. |
1. How we select which unsolved cases to highlight
Not every cold case makes the shortlist. The cases featured here were chosen based on a consistent set of criteria, so you understand why they matter and what makes them representative of the broader problem.
The primary factors include:
- Case age and investigative complexity. Cases that have resisted resolution for more than a decade, despite active law enforcement attention, reveal systemic challenges worth examining.
- Victim profile and public engagement. Cases that generated national attention tend to have richer documentation and more accessible tip pipelines.
- Ongoing investigative activity. A case is far more useful to spotlight when tips can still reach active investigators. Searchable police data portals like the City of Orlando’s open database show how local agencies publish case specifics to encourage new leads.
- Geographic spread. From unsolved mysteries in Texas to cold cases in the Pacific Northwest, geography matters because it shapes investigative resources and media reach.
Pro Tip: When researching cold cases, prioritize cases listed in NamUs or official law enforcement databases over true crime blogs. Official entries include verified case details and direct tip submission contacts.
2. Five landmark unsolved cases worth knowing
These are not obscure footnotes. Each case below has shaped how law enforcement, media, and the public think about unresolved crime.
The Zodiac Killer (California, 1968 to 1969) The Zodiac Killer claimed at least five confirmed victims across Northern California and sent taunting cipher-filled letters to newspapers. Decades of investigation produced no confirmed arrest. Despite a partial cipher solution published in 2020 by an amateur codebreaker, the killer’s identity remains unknown. This case is textbook in terms of why physical evidence alone is not enough without a suspect to match it.
Asha Degree (North Carolina, 2000) Nine-year-old Asha walked out of her home voluntarily in the middle of the night during a February storm and vanished. A backpack belonging to her was discovered buried in South Carolina two years later. No suspect has ever been charged. The case sits in a disturbing middle ground: there is evidence of premeditation, but no clear motive or perpetrator.
Kristin Smart (California, 1996) Cal Poly student Kristin Smart disappeared after a party, and the case went cold for decades. A murder conviction was eventually secured, but her body has not been found even after a search of property connected to the case. A conviction without physical recovery illustrates just how layered investigative complexity can be.
The Beaumont Children (South Australia, 1966) Three siblings vanished from a beach in broad daylight. The case became a defining trauma for an entire nation and is often cited as the event that ended the era of children playing unsupervised in Australia. No charges have ever been filed despite multiple persons of interest.
Laci Peterson Adjacent: The Jane Doe of Bear Brook (New Hampshire, 1985) Four unidentified female victims found in barrels in New Hampshire went unnamed for decades. DNA genealogy work in 2019 identified three of them, including a mother and three daughters. One victim remains unidentified. This case is a template for what modern forensic genealogy can accomplish and what gaps still remain.
“Cold cases are not closed cases. They are cases waiting for the right piece of information to arrive.” — Project Cold Case
3. Comparing these cases at a glance
| Case | Year | Victims | Location | Status |
|---|---|---|---|---|
| Zodiac Killer | 1968 to 1969 | 5 confirmed | California | No arrest; active tips accepted |
| Asha Degree | 2000 | 1 missing child | North Carolina | Open; FBI active |
| Kristin Smart | 1996 | 1 | California | Convicted; body not recovered |
| Beaumont Children | 1966 | 3 children | South Australia | Open; persons of interest named |
| Jane Doe of Bear Brook | 1985 | 4 | New Hampshire | 3 of 4 identified via DNA |
Each of these cases represents a different investigative bottleneck. The Zodiac case lacks a suspect. Asha Degree lacks a motive. The Bear Brook victims lacked identities for 34 years. Understanding those distinctions helps you target where public attention and tips can actually make a difference.
Pro Tip: When following active cases, check whether the FBI or a state law enforcement agency has a dedicated tip line. Submitting through the official channel is more effective than contacting media outlets.
4. How you can actively help with unsolved cases
This is where passive interest becomes real contribution. Public involvement has a documented history of reopening cold cases, but how you participate matters enormously.
Submitting a tip that actually helps
Most people who have relevant information never submit it. The ones who do often submit vague tips that investigators cannot act on. Effective anonymous tips are structured around five core elements:
- Who is involved, including names, nicknames, or descriptions.
- What happened or was witnessed, with as much specificity as possible.
- When the relevant event occurred, including approximate times.
- Where the activity took place, down to street intersections if possible.
- How you came to know this information, which helps investigators assess credibility.
Anonymous submissions can be made online, by phone, or via mobile apps through Crime Stoppers programs, and you are never required to testify. That removes the single biggest barrier most witnesses cite.
Volunteering through formal programs
Volunteering for cold case work is not about playing detective. Formal programs, like the cold case fellowship at Tiffin University, require participants to sign confidentiality agreements and go through structured onboarding. The benefits mentorship cold case volunteers receive include direct supervision from investigators and forensic professionals, which keeps the work credible.
Remote volunteer tasks in cold cases include data entry into public databases, transcription of old case files, and social media outreach for missing persons. Cold case volunteer coordination software used by some nonprofits tracks task assignments and maintains protocol compliance without exposing sensitive case details to untrained contributors.
If you want to work with volunteer cold case teams, start by contacting established nonprofits that operate within law enforcement partnerships, not independent online groups. The distinction protects both the investigation and you.
5. Technology and collaboration driving breakthroughs
The tools available today would have seemed like science fiction to investigators working the Zodiac case in 1969. The gap between what was once solvable and what is now solvable is genuinely dramatic.
Modern forensic breakthroughs include investigative genetic genealogy, which uses consumer DNA databases to construct family trees from unidentified biological material. This technique directly solved the Bear Brook case identifications and has been credited with dozens of cold case arrests.
Beyond DNA, the advances worth knowing include:
- NamUs (National Missing and Unidentified Persons System). A federally funded database that requires thorough data entry by administrators to make cases searchable and matchable. Incomplete entries literally prevent connections from being made.
- Digital forensics. Old phone records, surveillance footage, and social media archives are being processed by new tools that can surface patterns invisible to earlier investigators.
- Nonprofit partnerships. Organizations like Project Cold Case combine community outreach, family support, and law enforcement collaboration to maintain public pressure on inactive investigations.
| Technology | Primary application | Notable impact |
|---|---|---|
| DNA genealogy | Identifying unknown victims or suspects | Bear Brook, Golden State Killer |
| NamUs database | Cross-referencing missing and unidentified persons | Thousands of matches nationally |
| Digital forensics | Recovering deleted or archived evidence | Increasing in cold case use |
| Social media outreach | Amplifying tip solicitation | Measurably increases tip volume |
Why public pressure reopens cold cases is not a mystery. Sustained attention keeps cases funded, keeps witnesses engaged, and makes prosecutors willing to build cases on circumstantial evidence when physical evidence is limited.
My honest take on public involvement
I have spent years watching the true crime community engage with unsolved cases, and my clearest observation is this: enthusiasm without structure does more harm than good. I have seen tip lines flooded with speculation after a podcast episode airs. Investigators spend time sorting through noise instead of working leads. That is not a knock on public interest. It is a call to channel it properly.
What I find genuinely moving is when a community engages with a case the way a researcher would. Carefully, with sourced information, through the right channels, and with full awareness that a real family is waiting on the other end. The cases we remember are not always the ones with the most media coverage. They are the ones where someone who knew something finally told the right person.
Platforms that recruit volunteers for a cold case platform and train them with proper oversight are changing what community involvement can accomplish. The future of resolving unsolved cases is not purely technological. It is the combination of better tools and better-organized people using them responsibly.
— Crime
Explore and contribute through Crimesolverscentral
If reading this has you wanting to do more than follow along, Crimesolverscentral is built for exactly that. The platform hosts a searchable cold case database organized by state, covering over 264,913 missing persons and unsolved homicide cases. Whether you are researching unsolved mysteries in Texas, tracking a case in your own county, or looking for a structured way to join cold case volunteer networks, the database gives you a verified starting point. Community members can join as members, participate in fundraising, or connect with health and safety initiatives tied to active investigations. This is what responsible public engagement looks like: organized, verified, and connected to real investigative work.
FAQ
What qualifies a case as “cold”?
A cold case is any criminal investigation that has gone inactive due to a lack of viable leads, though it typically remains officially open. Most law enforcement agencies apply this label after a period of inactivity ranging from one to several years.
How many unsolved murders are there in the US?
The number runs into the hundreds of thousands when accounting for decades of backlogged cases. The clearance rate for homicides in the US has declined significantly since the 1960s, meaning more cases go unresolved each year than are solved.
Can I really help by submitting a tip?
Yes, especially if your tip is specific and structured. Precise, detail-rich tips that cover who, what, when, where, and how give investigators a concrete thread to follow, and you can submit anonymously without any obligation to testify.
What are the risks of volunteering for cold case work independently?
Unstructured participation can compromise active investigations, expose you to legal liability, and cause additional harm to victims’ families. Formal programs with confidentiality agreements and supervised onboarding protect everyone involved.
What is NamUs and why does it matter?
NamUs is the National Missing and Unidentified Persons System, a federally funded database that cross-references missing persons reports with unidentified remains. Thorough, complete entries are critical because incomplete data prevents the system from making matches that could close cases.