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Combined DNA Index System

United States national DNA database

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJun 28, 2026
Entity authorityQ1265403 ↗
Source-derived summary

The Combined DNA Index System (CODIS) is the United States national DNA database created and maintained by the Federal Bureau of Investigation. CODIS consists of three levels of information: Local DNA Index Systems (LDIS), where DNA profiles originate; State DNA Index Systems (SDIS), which allows for laboratories within states to share information; and the National DNA Index System (NDIS), which will enable states to compare DNA information with one another.

The CODIS software contains multiple databases depending on the type of information being searched against. Examples of these databases include missing persons, convicted offenders, and forensic samples collected from crime scenes. Each state and the federal system has different laws for the collection, upload, and analysis of information contained within their database. However, for privacy reasons, the CODIS database does not contain any personal identifying information, such as the name associated with the DNA profile. The uploading agency is notified of any hits to their samples and is responsible for disseminating personal information in accordance with their laws.

Establishment

The creation of a national DNA database within the U.S. was first mentioned by the Technical Working Group on DNA Analysis Methods (TWGDAM) in 1989. The FBI's strategic goal was to maximize the voluntary participation of states and avoid what happened several years earlier, when eight western states, frustrated with the process of creating the national Automated Fingerprint Identification System (AFIS) network, formed their own Western Identification Network (WIN). The FBI's strategy to discourage states from creating systems that competed with CODIS was to develop DNA databasing software and provide it free of charge to state and local crime laboratories.

Editorial summary

“Combined DNA Index System” enters the record as united States national DNA database. Crown Archives preserves that source wording while asking what Combined, Index and System can confirm, complicate or overturn.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1989—that can be checked directly. The selected authority fields contribute no independent date. Its strongest next move is a source search built around Combined, Index and System.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jun 28, 2026. The linked authority identifier is Q1265403. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1989.

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This entry incorporates text from “Combined DNA Index System” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.