Connecticut
Connecticut has no forensic science commission, no lab accreditation statute and no analyst license; a DNA Data Bank Oversight Panel covers the data bank only. In a criminal case, a petition for a new trial based on new DNA or forensic science evidence may be brought at any time after the evidence is discovered, free of the three-year limit. Since 2023 it has made NIBIN submission of firearms evidence mandatory, sent data bank hits from wrongly held samples to the conviction integrity unit, and set consent labels for sexual assault kits. From October 1, 2026, people on probation or parole may petition for DNA testing, denials are appealable, and most DNA samples are due within six months.
- Sources checked
- Part of
- Forensic Ledger
At a glance
- Oversight body
- No forensic science commission. The DNA Data Bank Oversight Panel (CGS 54-102m) is made up of the Chief State’s Attorney (chair), the Attorney General, the commissioners of Emergency Services and Public Protection and of Correction, the executive director of the Court Support Services Division and the Chief Public Defender, or their designees. It must “take such action as necessary to assure the integrity of the data bank,” including destroying inappropriately obtained samples, and must meet quarterly. Its meetings are open under the Freedom of Information Act except for personally identifiable DNA information, from which the Chief Public Defender is excluded. Its scope is the DNA data bank only; whether it meets in practice was not checked. The Division of Scientific Services is the state lab (CGS 29-7b), an operating division of the Department of Emergency Services and Public Protection.
- Lab accreditation
- No statutory mandate found in Chapters 529 or 961. Division procedures for DNA analysis “shall conform to nationally recognized and accepted standards for DNA analysis” (CGS 54-102i(a)). DUI chemical tests must use methods and equipment approved by the department (CGS 14-227a(b), (d)).
- Analyst licensing
- None found. The division must “render expert court testimony when requested” (CGS 29-7b(c)(5)).
- Admissibility standard
- Conn. Code Evid. § 7-2 (qualification and assistance to the trier of fact), with the State v. Porter, 241 Conn. 57 (1997), test for scientific evidence: reliability of the methodology and fit (Code of Evidence, 2023 ed.). The official commentary says Porter applies to “some—but not all—types of scientific expert testimony” and that the Code takes no position on extending Porter to technical or other specialized knowledge. Porter itself predates the judicial branch’s online opinion archive; its holding is stated here from the commentary. Connecticut has not adopted the 2023 change to Federal Rule 702: § 7-2 has no preponderance or “reliable application” language. The revisions adopted March 26, 2026 and published in the Law Journal of April 7, 2026 amend §§ 6-11 and 8-5 only (notice). By statute, DNA testing is “a reliable scientific technique” in criminal proceedings (CGS 54-86k(a)), and a party must give 21 days’ notice of intent to offer DNA results (54-86k(c)).
- Post-conviction forensic relief
- Yes, for new-trial petitions. Two routes. (1) DNA testing (CGS 54-102kk, as amended by P.A. 26-130 § 8): since October 1, 2026, a person convicted and sentenced to incarceration may petition the sentencing court during the term of incarceration, or after it while under probation, parole or correctional supervision. Testing is mandatory (“shall order”) on a reasonable probability that the petitioner would not have been prosecuted or convicted if exculpatory results had been available, if the evidence still exists and can be tested, was never DNA-tested or new testing may resolve an open issue, and the petition is to show innocence, not to delay. Testing is discretionary (“may order”) where results would probably have produced a more favorable verdict or sentence. Inability to pay cannot bar testing, indigent petitioners get counsel, and a denial is a final judgment for appeal. Evidence must be preserved under CGS 54-102jj. (2) Petition for a new trial (CGS 52-582): the three-year limit does not apply to a petition based on DNA or other newly discovered forensic scientific evidence that was not discoverable or available earlier, including evidence that undermines forensic evidence used at trial. The court considers whether the relevant science has changed, and relief requires a “reasonable likelihood there would have been a different outcome.”
- DNA database scope
- Convictions, plus a narrow arrestee group. Anyone convicted of a felony, or of an offense against a minor, a nonviolent sexual offense or a sexually violent offense, gives a sample whether sentenced to custody, a non-custodial sentence, probation or parole; so do people found not guilty by reason of mental disease or defect of such offenses, and out-of-state offenders under Connecticut supervision (CGS 54-102g). Arrestees: only a person arrested for a listed “serious felony” who has a prior felony conviction and no sample on file, and only “as available resources allow” (54-102g(a)); the lab analyzes those samples only as resources allow (54-102g(h), 54-102j(a)). Refusal is a class D felony. Profiles from arrest samples must be expunged if the charge is dismissed, nolled or ends in acquittal (54-102l). From October 1, 2026, samples in subsections (b), (c), (e) and (f) are due within six months of sentencing or of entering supervision, custody or jurisdiction; timing in (a) for arrestees and (d) for insanity acquittees is unchanged (P.A. 26-45 § 4). Information from “nonqualifying samples” must go to the conviction integrity unit before purge (54-102j(a), P.A. 25-29).
- Facial recognition
- No statute on police use of facial recognition was found. Since October 1, 2026, a business covered by the Connecticut Data Privacy Act that uses facial recognition on its premises for security, fraud, harassment or illegal-activity purposes must match only against a database it maintains itself and must post signs at public entrances linking to its facial recognition policy, unless the consumer consented in a commercial transaction (P.A. 26-100 § 45, CGS 42-524(a)(2)).
Changes, 2023 to 2026
Post-conviction DNA testing opened to people on probation or parole; denials made appealable
A petition was allowed only “at any time during the term of such incarceration.” It may now also be filed “after completion of such term and while subject to the jurisdiction or supervision of any probation, parole or correctional agency.” New subsection (f): “An order of the court denying the petitioner’s request for DNA testing ... shall be a final judgment for purposes of an appeal.” The testing standards in (b) and (c), the cost and indigency rules in (d) and counsel in (e) are unchanged. The section had not been amended since 2003. People fully discharged from supervision still cannot petition. The change was enacted in this omnibus act after the standalone bills, HB 6983 (2025) and HB 5308 (2026), did not pass.
For practitioners: A client on probation or parole can now petition for DNA testing, and a denial can be appealed.
DNA samples due within six months; one-time study of uncollected DNA
Section 4 replaces “prior to release from custody” and “prior to discharge from” supervision or custody with deadlines of “not later than six months after sentencing” (54-102g(b), (c)) or six months after entering supervision, custody or jurisdiction ((e), (f)). Timing for arrestees in (a) and for people found not guilty by reason of mental disease or defect in (d) is unchanged. Section 5 directs the commissioner of Emergency Services and Public Protection to study “lawfully owed DNA,” meaning samples owed under 54-102g. The study covers collection and submission practices across local and state police, the Division of Criminal Justice, Correction, Developmental Services and the Judicial Branch; a count of people who owe a sample but have not given one; barriers; and recommendations on timelines, tracking and reporting. The report is due to the Public Safety and Judiciary committees by July 1, 2027. The study is one-time, the act creates no standing body, and it states no funding.
For practitioners: Check when a client’s sample was taken against the new six-month deadline.
Business use of facial recognition for security: own-database matching and entrance signs
A controller under the Connecticut Data Privacy Act, or a consumer health data controller, that uses facial recognition on its premises for security, fraud, harassment or illegal-activity purposes must (i) match only against a database it maintains exclusively, and (ii) post legible signs at public entrances with a link or QR code to its facial recognition policy, which must give Attorney General contact information. The duties do not apply where the consumer consented in a commercial transaction. They are written as conditions of an exemption in 42-524. P.A. 26-130 § 19 repealed § 44 of this act, not § 45. The section does not govern police use of facial recognition or police requests for a business’s results.
For practitioners: If a case starts with a store’s facial recognition match, ask whether the store matched only against its own database and posted the required signs.
Data bank hits from wrongly held samples go to the conviction integrity unit before purge
Before a nonqualifying sample is expunged or purged, information derived from it in the data bank must be disclosed to the conviction integrity unit of the Office of the Chief State’s Attorney, “for the purpose of discharging the constitutional obligations of the Division of Criminal Justice relating to exculpatory evidence.” If the information is exculpatory to anyone charged or convicted, it “shall be disclosed” to that person or counsel. It “shall not otherwise be used for investigative or prosecutorial purposes.” A nonqualifying sample includes one entered in good faith but without authority, or one that should already have been purged or expunged.
For practitioners: Ask the conviction integrity unit whether a nonqualifying-sample hit bears on a client’s case; such hits cannot be used to investigate or prosecute.
Sexual assault kits labeled “anonymous,” “identified” or “reported”; FBI lab route removed
After collection, the health care facility must get the victim’s consent to label the kit “anonymous,” “identified” or “reported.” Police must still transfer kits within 10 days, now only to the Division of Scientific Services; the option of sending them to the FBI laboratory is deleted. The division must analyze “identified” and “reported” kits within 60 days and hold “anonymous” kits for at least five years. After analysis, the division may return evidence to the submitting agency, and whichever holds it keeps it until criminal proceedings end. Prior law already required analysis of every kit unless the victim chose to remain anonymous and not report, so the labels formalize an existing distinction. Missing a deadline still does not affect admissibility.
For practitioners: Ask which label a kit carried; the label decides whether the lab had to analyze it.
Police must submit or test-fire every firearm in custody; NIBIN participation made mandatory
Before the act, a police department “may submit to the laboratory any handgun” that came into its custody. Now, when any firearm comes into police custody from a criminal investigation, the law enforcement unit “shall either” submit the firearm or fired components to the lab or, if the lab permits it, test-fire the firearm and submit to the National Integrated Ballistic Information Network (NIBIN) “as expeditiously as is practicable” ((c)(1)). Cartridge cases recovered from crime scenes must be submitted to NIBIN ((c)(3)). The lab could already “participate in a national firearms evidence databank program”; the act makes NIBIN participation mandatory. The lab’s power to let police firearms sections test-fire, run remote terminals and search the databank, and the duty to adopt regulations, carry over from prior law, re-lettered as (f) and (g) and extended from handguns to all firearms. The act does not address examiner qualifications or how examiners word conclusions.
For practitioners: If a NIBIN lead ties a client to a firearm, ask for the examiner’s comparison work behind it.
Internet Crimes Against Children Task Force placed within the Division of Scientific Services
“There is established within the Division of Scientific Services the Connecticut Internet Crimes Against Children Task Force, which shall consist of affiliate law enforcement agencies in the state.” The task force must use state and federal money consistent with 34 U.S.C. 21114. The section says nothing about digital forensic examinations, standards or examiner qualifications.
For practitioners: The task force sits inside the state lab’s division, but no statute sets standards for its digital examinations.
Pending bills
Checked and unchanged
- CGS 54-86k (DNA admissibility and notice), 54-102i, 54-102l and 54-102m: histories end at P.A. 11-51, 11-91 or 11-207. CGS 52-582 was last amended by P.A. 18-61.
- Code of Evidence § 7-2 is unchanged since the 2023 edition.
- P.A. 26-45 §§ 2 and 3 (effective October 1, 2026) change “report of the test” to “report of the result of such test” in the chemical-test admissibility conditions of CGS 14-227a(b) and 15-140r(a). The wording change does not alter testing standards.
- No 2023 to 2026 public act on rapid DNA or forensic genetic genealogy was found in the legislature’s subject indexes for DNA testing, genetic information, evidence or laboratories.
- Not checked: a full-text search of the statutes, which was not available. Acts under other subject headings were checked through history notes in Chapters 368a, 529, 926, 959, 960 and 961 only.
Last updated October 19, 2026Source: United States Council for Law & InvestigationCite as: United States Council for Law & Investigation, “Connecticut forensic science oversight: Forensic Ledger,” uscli.org/forensic-science-tracker/connecticut (last updated October 19, 2026). Text licensed CC BY 4.0.