Two famous waits fail the first-verdict test. Killen's 2005 conviction came 41 years after the 1964 Mississippi killings, but other men were convicted federally in 1967. The 1963 Birmingham church bombing's first conviction came in 1977, not 2001.
Back to the trend of the day: Man convicted of rapper Tupac's 1996 killing gets 40 years to life
Poly Rating · from the trend of the day
Cold Cases Solved Decades Later: Top 10 Longest (2026)
Carla Walker's family waited about 47 years, from 1974 until her killer pleaded guilty mid-trial in 2021. Tupac Shakur's case, closed after nearly 30 years, is the only one here won on the accused's own memoir and interviews, with no DNA at all.
- No. 1: Tupac Shakur killing, Las Vegas (1996)
- 10 places
01Final list
The leading AIs each built their own list of ten independently. Here is one result that is easy to check: every place has a reason, a source, and the list of AIs that included it.
Order: from most to least AI agreement.
A bright badge means this AI put the entry on its list. A dim badge means it did not.
- 1
Tupac Shakur killing, Las Vegas (1996)
Nearly 30 years with no DNA. The DA said 'the strength of our case was Mr. Davis… and his mouth.' Sentenced Oct 13, 2026 to 40 to life; the appeal hasn't been heard.
Included it: Claude, ChatGPT, Gemini, Qwen, Kimi.In their lists: Claude: 9 · ChatGPT: see list · Gemini: 10 · Qwen: 1 · Kimi: 10
What each AI noted 5
- Claudeplace 9
A 30-year wait that ended on the suspect's own words, from interviews and a 2019 memoir, which a defense lawyer called money-making fiction.
- ChatGPT
Named differently in its own list: open the full list.
see list - Geminiplace 10
Unlike nearly every 30-year cold case resolved through lab forensics, this conviction was moved entirely by the defendant's own tell-all memoir and broadcast television admissions.
Source ↗ - Qwenplace 1
Keffe D's own documentary confessions moved a 30-year wait to a 40-years-to-life sentence in 2026.
Source ↗ - Kimiplace 10
Just shy of 30 years — no DNA, no fingerprints; prosecutors said 'the strength of our case was Mr. Davis… and his mouth': his own memoir, interviews and podcasts.
Source ↗
5 AIs put it here - 2
Jam Master Jay killing, New York (2002)
About 22 years to the Feb 2024 verdicts. In Dec 2025 the judge acquitted Karl Jordan Jr. but left Ronald Washington's conviction standing. Qwen's 'Washington pleaded guilty in 2026' conflicts.
Included it: Claude, ChatGPT, Qwen, Kimi. Did not include: Gemini.In their lists: Claude: 10 · ChatGPT: see list · Qwen: 5 · Kimi: see list
What each AI noted 4
- Claudeplace 10
After about 22 years, one of the two convictions was thrown out in December 2025 and the other was left standing.
Source ↗ - ChatGPT
Named differently in its own list: open the full list.
see list - Qwenplace 5
Ronald Washington pleaded guilty in 2026, 24 years after the killing, after another man's conviction was thrown out.
Source ↗ - Kimi
Named differently in its own list: open the full list.
see list
4 AIs put it here - 3
Golden State Killer (Joseph DeAngelo, California)
45 years from the 1975 Snelling killing he admitted to; about 42 from the earliest murders in his plea (1978). GEDmatch family-tree work cracked it, and the 2020 plea waived appeals.
Included it: Claude, Gemini, Kimi. Did not include: ChatGPT, Qwen.In their lists: Claude: 2 · Gemini: 3 · Kimi: 2
What each AI noted 3
- Claudeplace 2
The earliest crimes were in 1975. The June 2020 plea to 13 murders came after a relative's profile in a public genealogy database matched the crime-scene DNA.
Source ↗ - Geminiplace 3
A breakthrough linking crime-scene genetics through public open-source genealogical databases produced an unappealable guilty plea nearly 45 years after his first homicide.
Source ↗ - Kimiplace 2
45 years from the first killing to a guilty plea — cracked when crime-scene DNA was uploaded to a public genealogy site and family-tree builders walked it to an ex-cop's door.
Source ↗
3 AIs put it here - 4
Medgar Evers assassination, Mississippi (1963)
30 years 8 months after two hung juries in 1964. Reopened in 1989, it ended in a 1994 conviction built on witnesses who heard Beckwith boast, upheld 4–2 in 1997.
Included it: Claude, Gemini, Kimi. Did not include: ChatGPT, Qwen.In their lists: Claude: 8 · Gemini: 9 · Kimi: 9
What each AI noted 3
- Claudeplace 8
After two hung juries in 1964, a third trial 31 years later produced a conviction the state high court upheld 4-2.
Source ↗ - Geminiplace 9
Decades after two all-white juries deadlocked in 1964, unsealed state sovereignty files and testimony of the suspect boasting about the rifle shot sealed a conviction 30 years and 8 months later.
Source ↗ - Kimiplace 9
30 years, 8 months — two hung juries in 1964, then secret state files showing jury tampering and new witnesses who had heard him boast.
Source ↗
3 AIs put it here - 5
Carla Walker murder, Fort Worth (1974)
About 47 years: Glen McCurley pleaded guilty mid-trial in 2021 after DNA from her clothing. ChatGPT's 'Jerry McFadden, 2020' names the wrong man and year.
Included it: Claude, ChatGPT. Did not include: Gemini, Qwen, Kimi.In their lists: Claude: 1 · ChatGPT: 8
What each AI noted 2
- Claudeplace 1
A 47-year wait ended mid-trial in 2021 with a guilty plea after DNA evidence was presented.
Source ↗ - ChatGPTplace 8
Nearly 46 years later, DNA-linked evidence led to a guilty plea on the third day of trial.
2 AIs put it here - 6
Etan Patz, New York (1979)
About 37.7 years to Pedro Hernandez's February 2017 verdict, after a relative's tip. Affirmed in 2019, overturned federally in 2025; Kimi reports it was restored in 2026.
Included it: Gemini, Kimi. Did not include: Claude, ChatGPT, Qwen.In their lists: Gemini: 6 · Kimi: 4
What each AI noted 2
- Geminiplace 6
A tip from a relative and confessions made to community church members brought a murder conviction 37 years and 8 months after the boy vanished walking to his school bus.
Source ↗ - Kimiplace 4
Nearly 38 years — a 6-year-old's walk to the school bus; the break came when a relative, watching news of a basement dig, finally called police about a confession from 1980.
Source ↗
2 AIs put it here - 7
Jay Cook and Tanya Van Cuylenborg, Washington (1987)
Unconfirmed: 31.6 years to the first jury conviction of a suspect found by genetic genealogy (2019). An appeals court tossed it; the state Supreme Court reinstated it in 2022.
Included it: Claude, Gemini. Did not include: ChatGPT, Qwen, Kimi.In their lists: Claude: 7 · Gemini: 8
What each AI noted 2
- Claudeplace 7
The first trial of a suspect found through genetic genealogy ended in a guilty verdict after 32 years.
Source ↗ - Geminiplace 8
Marked the first conviction in history secured via genetic genealogy to go before a trial jury, remaining fully affirmed by the Washington State Supreme Court 32 years later.
Source ↗
2 AIs put it here - 8
April Tinsley murder, Fort Wayne (1988)
30 years 8 months: John Miller pleaded guilty in December 2018 after genealogy named him. The taunting notes he left had preserved his DNA for years.
Included it: ChatGPT, Kimi. Did not include: Claude, Gemini, Qwen.In their lists: ChatGPT: 9 · Kimi: 8
What each AI noted 2
2 AIs put it here - 9
Henry Dee and Charles Moore, Mississippi (1964)
43 years, longer than No. 3, but only one AI gave it, so it sits below. A panel tossed James Ford Seale's 2007 verdict in 2008; it was reinstated and affirmed in 2010.
Included it: Claude. Did not include: ChatGPT, Gemini, Qwen, Kimi.In their lists: Claude: 3
What each AI noted 1
- Claudeplace 3
A 43-year wait. A 2008 panel threw the verdict out on statute of limitations grounds, and the full court later put it back.
Source ↗
1 AIs put it here - 10
Gilgo Beach killings, Long Island (1993–2010)
About 32.4 years from the 1993 Costilla killing to Rex Heuermann's April 2026 guilty plea. A 2010 witness tip about his truck and DNA from pizza crust broke it, not genealogy.
Included it: Kimi. Did not include: Claude, ChatGPT, Gemini, Qwen.In their lists: Kimi: 7
What each AI noted 1
- Kimiplace 7
32 years from the earliest victim — and the break wasn't genealogy; it was a witness's memory of a Chevy Avalanche, plus a pizza crust in a Manhattan trash can.
Source ↗
1 AIs put it here
02Worth knowing
What the AIs noticed while building the list.
Nebraska's 56-year Mary Kay Heese case ended in a no-contest plea to conspiracy, not a guilty plea to murder. The plea carried a 2-year maximum, and Joseph Ambroz was released in November 2025.
The oldest 'solved' cases have no verdict: the 1956 Montana double murder and Vermont's 1971 Rita Curran case both ended with a suspect who had already died.
Maria Ridulph's 1957 case was hailed as the oldest cold-case conviction after 55 years in 2012, but the conviction was vacated in 2016. A 'solved' case can still be thrown out on review.
An FBI account puts the James Ricks case at nearly 50 years from a 1965 killing to a guilty plea after a recorded confession. With only that one source it is not ranked.
03Questions people ask
what is the longest cold case solved
By a conviction that still stands, the longest is the 1974 Carla Walker case: about 47 years to Glen McCurley's 2021 guilty plea. Older 'solved' cases mostly ended with a suspect who had died.
Source ↗what is the longest cold case solved in nebraska
The 1969 killing of Mary Kay Heese in Wahoo. It took 56 years, to Joseph Ambroz's 2025 no-contest plea to conspiracy, which carried a 2-year maximum.
Source ↗what is the oldest cold case solved
Police call a 1956 Montana double murder the oldest solved by genetic genealogy, closed after 65 years in 2021. The suspect, Kenneth Gould, died in 2007, so there was no trial.
Source ↗what is the oldest cold case solved by dna
The 1956 killing of Patricia Kalitzke and Duane Bogle, identified 65 years later. Kimi calls the 1964 Mary Theresa Simpson case (61 years) the oldest, but the Montana case is older.
Source ↗04How we counted
In plain words, no formulas.
1The question
Top 10 Longest Waits From a Widely Reported US Killing to a Guilty Verdict That Still Stands, and What Finally Moved Each Case
2Why this topic
The reader sees the time from crime to a verdict that still stands, plus what broke each case. Clearance data and news timelines each show only part of that.
3Where it applies
United States
4What we looked at
- Years from the killing to the first guilty verdict or guilty plea in the court record
- Whether the verdict still stood after the first full round of review after trial
- What moved the case: DNA or family-tree genealogy, a witness who started talking, community tips and rewards, or the suspect's own public statements
- Murder Accountability Project (FBI UCR / Supplementary Homicide Reports) — Homicides since 1965 and the share police mark cleared: by arrest, or 'by exception' (e.g. the suspect died). Neither one is
- Court records and AP/press reporting per case — Date of the first guilty verdict or guilty plea for that killing, and any later ruling that kept it or threw it out
- Break-type label (this list's judgment) — What moved each case: DNA or family-tree genealogy, a witness who started talking, community tips, or the suspect's own public statements
5Who ranked
The leading AIs, each building its own list of ten independently and naming a source for every place: Claude, ChatGPT, Gemini, Qwen, Kimi.
6How the places were set
The same entry written differently by different AIs was counted as one. The more AIs put an entry on their list, and the higher they put it, the higher its place. "AI agreement" shows how many of the AIs had it on their own list. Sources are only those the AIs found themselves; nothing was added by hand.
05Each AI's own list
🇺🇸 Claude10 places · 3 notes
The same question, answered by Claude alone. The final list above combines all the AIs.
- 1Carla Walker murder, Fort Worth (1974; Glen McCurley)
A 47-year wait ended mid-trial in 2021 with a guilty plea after DNA evidence was presented.
Source ↗ - 2Golden State Killer (Joseph DeAngelo, 1975 to 2020 plea)
The earliest crimes were in 1975. The June 2020 plea to 13 murders came after a relative's profile in a public genealogy database matched the crime-scene DNA.
Source ↗ - 3Henry Dee and Charles Moore case, Mississippi (1964; James Ford Seale, convicted 2007)
A 43-year wait. A 2008 panel threw the verdict out on statute of limitations grounds, and the full court later put it back.
Source ↗ - 4Mississippi Burning killings (1964; Edgar Ray Killen, convicted 2005)
Convicted 41 years to the day after the killings, but of manslaughter, not murder.
Source ↗ - 5Jody Loomis murder, Washington (1972; Terrence Miller)
A 48-year wait, and the jury's guilty verdict came after the defendant had died.
Source ↗ - 6Birmingham church bombing (1963; Thomas Blanton, convicted 2001)
The key evidence was FBI tapes secretly recorded 37 years earlier.
Source ↗ - 7Jay Cook and Tanya Van Cuylenborg case (1987; William Talbott II, convicted 2019)
The first trial of a suspect found through genetic genealogy ended in a guilty verdict after 32 years.
Source ↗ - 8Medgar Evers killing (1963; Byron De La Beckwith, convicted 1994)
After two hung juries in 1964, a third trial 31 years later produced a conviction the state high court upheld 4-2.
Source ↗ - 9Tupac Shakur killing (1996; Duane 'Keffe D' Davis, convicted Aug 2026)
A 30-year wait that ended on the suspect's own words, from interviews and a 2019 memoir, which a defense lawyer called money-making fiction.
- 10Jam Master Jay killing (2002; Karl Jordan Jr. and Ronald Washington, convicted Feb 2024)
After about 22 years, one of the two convictions was thrown out in December 2025 and the other was left standing.
Source ↗
What Claude noticed
The oldest case solved by genealogy, a 1956 Montana double killing, ended with a suspect who died in 2007. Seattle's 1967 case was the same, with a suspect who died in 1987. Neither produced a verdict, which shows the gap between 'cleared' and 'convicted'.
Linda O'Keefe's 1973 case counts as cleared, but the suspect, James Neal, died in 2020 awaiting trial. This is a 'by exception' clearance with no conviction.
In the Jam Master Jay case, one judge reached two different results on two defendants. She found the jury had no evidence to infer Jordan's motive, and found enough for Washington.
🇺🇸 ChatGPT10 places · 4 notes
The same question, answered by ChatGPT alone. The final list above combines all the AIs.
- 1Rita Curran murder, Burlington, Vermont (1971)
More than 51 years passed before DNA from a discarded cigarette helped identify a suspect who had died.
Source ↗ - 2James Leon Clay murder of James Ricks, Delaware (1965)
A prison-cellmate tip and a taped confession turned a nearly 50-year-old case into a guilty plea.
Source ↗ - 3Helene Pruszynski murder, Colorado (1980)
Forensic genealogy traced a 40-year-old case to a suspect who had changed his name.
Source ↗ - 4Diane Maxwell Jackson murder, Houston, Texas (1969)
A latent fingerprint and the victim’s brother’s persistence helped produce a guilty plea 34 years later.
Source ↗ - 5Morgan Violi murder, Kentucky (1996)
Three decades ended with a federal guilty plea and a life sentence agreement, but sentencing was still pending on the research date.
Source ↗ - 6Cinthia “Cindi” Wanner murder, California (1991)
A 35-year wait ended in a first-degree murder plea in June 2026.
- 7Barbara Martz murder, San Francisco, California (1985)
DNA identified the killer 17 years later, but the first guilty verdict was thrown out; a later verdict survived appeal.
Source ↗ - 8Carla Walker murder, Fort Worth, Texas (1974)
Nearly 46 years later, DNA-linked evidence led to a guilty plea on the third day of trial.
- 9April Tinsley murder, Fort Wayne, Indiana (1988)
Thirty years after an eight-year-old was killed, genealogy helped identify a man already writing taunts to police.
Source ↗ - 10Michelle Martinko murder, Cedar Rapids, Iowa (1979)
A genealogy search narrowed a 39-year-old case to a suspect whose DNA matched evidence from the scene.
Source ↗
What ChatGPT noticed
The longest identified cold-case interval is not necessarily the longest wait to a conviction: the 52-year-old Rita Curran case produced a deceased suspect identification, not a guilty verdict or plea.
The James Ricks case is an exception to the modern DNA pattern: a prison tip led to a recorded confession and guilty plea nearly 50 years after the killing.
A first guilty verdict can be overturned and a later retrial can still produce a lasting conviction, as in the Barbara Martz case.
The Tupac Shakur case illustrates a route absent from clearance tables: Davis’s own public accounts helped investigators build the case, and a jury convicted him nearly 30 years after the killing.
🇺🇸 Gemini10 places · 2 notes
The same question, answered by Gemini alone. The final list above combines all the AIs.
- 1Joseph Ambroz (1969 Murder of Mary Kay Heese, Nebraska)
A cold case grand jury and renewed forensic review secured a plea 56 years after the 17-year-old was found stabbed outside Wahoo, marking Nebraska's oldest solved homicide case.
- 2John Arthur Getreu (1973 Leslie Perlov & 1974 Janet Taylor Murders, California)
Decades-old DNA swabbed from clothing matched through familial genetic genealogy brought guilty pleas 48 to 49 years after the campus-area killings.
- 3Joseph James DeAngelo (1975 Claude Snelling Murder & Golden State Killings, California)
A breakthrough linking crime-scene genetics through public open-source genealogical databases produced an unappealable guilty plea nearly 45 years after his first homicide.
Source ↗ - 4Edgar Ray Killen (1964 Mississippi Civil Rights Murders)
Convicted exactly 41 years to the day after the killings of James Chaney, Andrew Goodman, and Michael Schwerner, propelled by reopened state records and investigative reporting.
Source ↗ - 5Bobby Frank Cherry (1963 16th Street Baptist Church Bombing, Alabama)
Secretly recorded FBI surveillance tapes and family members who finally broke decades of silence delivered a standing conviction 38 years and 8 months later.
- 6Pedro Hernandez (1979 Disappearance & Murder of Etan Patz, New York)
A tip from a relative and confessions made to community church members brought a murder conviction 37 years and 8 months after the boy vanished walking to his school bus.
Source ↗ - 7Thomas Edwin Blanton Jr. (1963 16th Street Baptist Church Bombing, Alabama)
A jury deliberated just two and a half hours to convict Blanton 37 years and 7 months later after hidden microphone recordings made in his kitchen were played aloud in court.
- 8William Earl Talbott II (1987 Murders of Jay Cook & Tanya Van Cuylenborg, Washington)
Marked the first conviction in history secured via genetic genealogy to go before a trial jury, remaining fully affirmed by the Washington State Supreme Court 32 years later.
Source ↗ - 9Byron De La Beckwith (1963 Assassination of Medgar Evers, Mississippi)
Decades after two all-white juries deadlocked in 1964, unsealed state sovereignty files and testimony of the suspect boasting about the rifle shot sealed a conviction 30 years and 8 months later.
Source ↗ - 10Duane 'Keffe D' Davis (1996 Killing of Tupac Shakur, Nevada)
Unlike nearly every 30-year cold case resolved through lab forensics, this conviction was moved entirely by the defendant's own tell-all memoir and broadcast television admissions.
Source ↗
What Gemini noticed
The Maria Ridulph 1957 case was initially heralded as the oldest cold case conviction in American history when Jack McCullough was convicted in 2012 after 55 years; however, his conviction was vacated in 2016 following alibi telephone record discovery, demonstrating why sustained legal review is critical.
While nearly all post-2018 historic cold case solves hinge upon degraded DNA samples and family-tree genealogy, high-profile cases like Duane 'Keffe D' Davis (29+ years) and Robert Durst (21 years) were broken exclusively by the suspects' own unforced media admissions and published memoirs.
🇨🇳 Qwen10 places · 1 notes
The same question, answered by Qwen alone. The final list above combines all the AIs.
- 1Tupac Shakur (1996)
Keffe D's own documentary confessions moved a 30-year wait to a 40-years-to-life sentence in 2026.
Source ↗ - 2Mary Kay Heese (1969)
A 56-year wait ended in 2025 when a new book and tips led to a guilty plea for conspiracy.
Source ↗ - 3Alys Eberhardt (1965)
Serial killer Richard Cottingham confessed to the 61-year-old murder in 2026, closing the case without a trial.
Source ↗ - 4Mary Schlais (1974)
DNA genealogy cracked the 50-year-old cold case, leading to a conviction that still stands.
Source ↗ - 5Jam Master Jay (2002)
Ronald Washington pleaded guilty in 2026, 24 years after the killing, after another man's conviction was thrown out.
Source ↗ - 6Hot dog napkin murder (1993)
A discarded hot dog napkin provided the DNA that led to a guilty verdict 29 years later.
Source ↗ - 7Bogle and Kalitzke (1956)
Genetic genealogy solved the 65-year-old double murder, marking one of the oldest cases resolved by family-tree DNA.
- 8Washington 1989 Cold Case
A Coke can left at the scene provided the DNA that convicted the killer 37 years later.
Source ↗ - 9Marjorie Rudolph (1966)
Cigarette DNA solved the 60-year-old Bay Area cold case, identifying the killer six decades later.
Source ↗ - 10New York 1945 Cold Case
A 79-year wait ended when investigators identified the killer in what was called New York's longest cold case.
Source ↗
What Qwen noticed
Almost all 30-year cases were moved by forensics, but the Tupac Shakur case was broken wide open by the suspect's own public statements in a documentary.
🇨🇳 Kimi10 places · 4 notes
The same question, answered by Kimi alone. The final list above combines all the AIs.
- 1Mary Kay Heese murder (Wahoo, Nebraska, 1969)
The longest wait in America — 56 years from a 17-year-old's killing to a no-contest conspiracy plea carrying a 2-year sentence; the lead investigator quit in protest: 'He got away with murder.'
Source ↗ - 2Golden State Killer case (California, 1975–1986)
45 years from the first killing to a guilty plea — cracked when crime-scene DNA was uploaded to a public genealogy site and family-tree builders walked it to an ex-cop's door.
Source ↗ - 3Freedom Summer murders (Mississippi, 1964)
41 years — three civil-rights workers buried in an earthen dam; what finally moved it was a reporter, a community coalition, and the suspect's own taped words to a student interviewer.
Source ↗ - 4Etan Patz disappearance (New York, 1979)
Nearly 38 years — a 6-year-old's walk to the school bus; the break came when a relative, watching news of a basement dig, finally called police about a confession from 1980.
Source ↗ - 516th Street Baptist Church bombing (Alabama, 1963)
37½ years — four girls killed in church; what convicted him in 2001 were his own words, taped by the FBI under his kitchen sink in 1964.
Source ↗ - 6Michella Welch murder (Tacoma, Washington, 1986)
36 years — a 12-year-old last seen in a Tacoma park; a family-tree built from a discarded napkin led to a judge-alone verdict in 2022.
- 7Gilgo Beach serial killings (New York, 1993–2010)
32 years from the earliest victim — and the break wasn't genealogy; it was a witness's memory of a Chevy Avalanche, plus a pizza crust in a Manhattan trash can.
Source ↗ - 8April Tinsley murder (Fort Wayne, Indiana, 1988)
30 years, 8 months — the killer taunted police with DNA-laden notes for decades; a public DNA database gave him a name in July 2018.
Source ↗ - 9Medgar Evers assassination (Mississippi, 1963)
30 years, 8 months — two hung juries in 1964, then secret state files showing jury tampering and new witnesses who had heard him boast.
Source ↗ - 10Tupac Shakur murder (Las Vegas, Nevada, 1996)
Just shy of 30 years — no DNA, no fingerprints; prosecutors said 'the strength of our case was Mr. Davis… and his mouth': his own memoir, interviews and podcasts.
Source ↗
What Kimi noticed
The two hip-hop cold cases moved by completely different forces: Tupac's ended in a jury verdict built on the defendant's own words, while Jam Master Jay's 2002 killing (21 years to a 2024 verdict) was witness-driven — and one of its two convictions was voided in December 2025.
The very oldest 'solved' cases end without a courtroom: Mary Theresa Simpson (1964) was identified after 61 years by DNA and genealogy — the oldest case ever solved with DNA — but her killer died in 2004, so there is no verdict and never will be; identification and conviction are different milestones.
Nebraska's record 56-year wait ended with the shortest sentence on this list: two years, halved by good-time, and the investigator who built the case walked out of the courtroom and retired on the spot.
Almost every 30-plus-year case on the list was moved by forensics or old confessions surfacing — civil-rights-era convictions (Evers, 16th Street, Freedom Summer) are the striking exception, moved by journalism, sealed files and people finally talking.