Cold Case Checker gathers news, official records, and public databases on the best-known unsolved murders and missing-person cases in the United States. Each file lays out what happened, who the victims or missing people were, every named suspect, and the evidence for and against them. Then it offers a hypothesis and flags the loose ends that may have been missed.
The first nine are the best-known unsolved cases in US history, ranked by how widely each is known and how long it has held public attention. The ranking is editorial, not official. Every other file is listed under More cases, in the order it was researched.
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A dated timeline built from police, court, and news records.
Everyone publicly named, with evidence for and against, and what is disputed.
Our reading of the evidence, labeled as opinion, with a stated confidence.
Leads, tests, and records that look underexplored, plus live news and database links.
Read this. Hypotheses on this site are editorial analysis of public information. They are not findings of fact, and nobody named here has been convicted of these crimes. If you have information about a real case, contact the investigating agency listed on that case's page.