Can Police Take Your DNA Off a Fork?

Almost certainly yes, and they do not need a warrant to do it. If you leave a fork, a cup, a straw, or a cigarette butt behind, courts have overwhelmingly held that you gave up your privacy interest in it, and in the genetic material you left on it. That is the settled rule. The part that is not settled, and the part a defense lawyer should be raising, is whether abandoning the object is the same thing as abandoning your genome.

The Case That Prompted This

In late August 2026, the Collier County Sheriff’s Office in Florida announced the arrest of Terry Lynn Denton, 71, for a 1999 home-invasion sexual battery in Naples. The case had gone 27 years without a suspect. Investigators used forensic investigative genetic genealogy to develop leads. The FBI, not local detectives, then collected a metal fork Denton had used at a restaurant, and his profile was compared to the crime-scene evidence. He was arrested in Sarasota County, Florida; he had been living in Arizona. It was the agency’s first arrest from a genetic genealogy investigation. Mr. Denton is charged, not convicted, and is presumed innocent.

That two-step sequence is the thing to notice, because it is how almost every genetic genealogy case actually works. Genealogy does not identify anyone. It produces a family tree and a name to look at. Something else has to connect that name to the crime-scene profile, and that something is usually a discarded object. We covered the database half of this problem in our post on genetic genealogy and the Fourth Amendment, and the science of pulling profiles from degraded material in our piece on a cold case solved with 45-year-old hair. This post is about the step in between.

Where the Abandonment Rule Comes From

The doctrine predates DNA entirely. In California v. Greenwood, 486 U.S. 35 (1988), the Supreme Court held that police did not need a warrant to search garbage bags left at the curb, because the defendant had exposed the trash to the public and had no reasonable expectation of privacy in it. The principle runs back further still, to Hester v. United States, 265 U.S. 57 (1924), where the Court found no Fourth Amendment violation in officers retrieving containers a suspect had thrown away. Lower courts carried that framework straight across to biological material, and have found no protected privacy interest in DNA taken from cigarette butts, drinking straws, cups, napkins, and utensils.

Add Maryland v. King, 569 U.S. 435 (2013), which upheld buccal swabs taken at booking for serious offenses as a reasonable booking procedure, and the practical picture is that police have several lawful routes to your DNA, and abandonment is the one that requires the least justification. It requires none at all.

But read King closely, because the Court reserved the very question this post is about. Justice Kennedy wrote that if in the future police analyzed samples to determine, for example, a predisposition for a particular disease or other hereditary factors not relevant to identity, that case would present additional privacy concerns not present here. That is the Supreme Court drawing the line between identification and interrogation of the genome, in an opinion the government won. It is the strongest sentence available to a defendant arguing that sequencing is not the same as seizing.

What Texas Actually Requires, and What It Does Not

Texas has a two-part abandonment test, and it is worth stating precisely, because it is easy to misread in a way that will get a motion denied. In Matthews v. State, 431 S.W.3d 596, 608-09 (Tex. Crim. App. 2014), the Court of Criminal Appeals wrote that merely discarding property is not synonymous with abandonment, and that to abandon property the decision to abandon must be voluntary and the defendant must intend to abandon it.

Read the next sentence too. The court immediately defined the term: abandonment is not voluntary if it is the product of police misconduct, and it cannot be coerced by unlawful police action such as an arrest without probable cause or an illegal stop or search. Comer v. State is the illustration, where a syringe dropped and kicked under a car was not abandoned because the police pursuit was itself unlawful. So voluntary in Texas is a term of art. It asks whether the police caused the discarding, not whether the person consciously chose to part with what they left behind.

That matters because the intuitive argument, that nobody voluntarily sheds skin cells, is a true statement about ordinary English and a losing one under Texas doctrine. Worse, it has already been tried and rejected here. In McCurley v. State, the Fort Worth Court of Appeals confronted a defendant arguing for a DNA exception to the abandonment doctrine and answered that none of his authorities established such an exception in Texas or, so far as that court could tell, in any other jurisdiction in the nation. It pointed instead to Pollard v. State out of Waco and to Guy v. State, both applying abandonment to DNA taken from discarded property. That is a 2022 decision from one of the appellate districts this firm practices in. Anyone raising this issue in North Texas should expect the State to put McCurley in front of the judge, and should be ready with a different framing rather than a surprised one.

There is also an answer the State will reach for, and it is a good one, so name it first. Nobody voluntarily leaves a latent fingerprint on a drinking glass either. If involuntary shedding defeated abandonment, fingerprint evidence would go with it, and no court is going to accept that. The Iowa Supreme Court made precisely that point. An argument that proves too much persuades no one.

What survives all of that is Article 38.23 of the Code of Criminal Procedure, and it is the most useful Texas material here. Article 38.23 excludes evidence obtained in violation of law by an officer or other person. The phrase “or other person” reaches private actors and has no federal analogue. In a genetic genealogy case, where a private laboratory, a consumer database, or an independent genealogist may sit in the collection chain, a statutory exclusionary rule that binds private parties is worth considerably more than the Texas Constitution, which under Hulit v. State, 982 S.W.2d 431 (Tex. Crim. App. 1998), gives a defendant no more protection than the Fourth Amendment in this area.

The Argument That Is Still Open

Here is the distinction that has not been resolved by the Supreme Court. Seizing a fork and sequencing a genome are two different acts. Greenwood says you have no privacy interest in the object you threw away. It does not say that everything derivable from that object is equally unprotected. A discarded cup tells the government nothing until a laboratory extracts, amplifies, and sequences what is on it, and what comes back is not evidence about the cup. It is a record of familial relationships, ancestry, and predisposition to disease that will outlive the case.

The other half of the argument is that abandonment assumes a voluntary act. You can choose not to put your trash on the curb. You cannot choose to stop shedding skin cells. Every surface you touch carries your DNA whether you intend it or not, which makes the analogy to garbage strained at exactly the point where it does the most work.

That argument has not won yet but it is more viable now than it was five years ago, because the Supreme Court has spent the last several terms narrowing the idea that exposure to a third party ends the inquiry. Carpenter v. United States, 585 U.S. 296 (2018), held that cell site location records were protected despite being held by a carrier. This June, in Chatrie v. United States, the Court extended that reasoning to Google location history and again declined to let the third-party doctrine do all the work, which we break down in our post on geofence warrants. The through-line in both is that some categories of information are revealing enough that the old rules do not automatically apply. DNA is a strong candidate for that list. No court has yet so held in this context, though United States v. Davis, 690 F.3d 226 (4th Cir. 2012), did hold that profiling lawfully obtained biological material was itself a search, in a different posture. Expect the State to distinguish it. Cite it anyway.

The cleanest statement of the argument comes from a dissent. In State v. Burns, decided by the Iowa Supreme Court in 2023, Justice Oxley wrote separately to make the point this post has been building toward: extracting a genetic profile is an act distinct from picking up the object, and it requires its own justification. That framing is the right one. It does not depend on whether shedding skin cells is voluntary, which is a losing question, and it does not prove too much, because lifting a latent fingerprint reveals nothing beyond identity while sequencing a genome reveals a great deal more. It routes instead through Carpenter and Chatrie, where the Court has repeatedly asked whether a technique hands the government a power it never practically had. That is the hook to hang this on.

There is also a warning worth absorbing. The Supreme Court was asked this question six months ago and passed on it. In State v. Sharpe, 353 Conn. 564 (2025), the Connecticut Supreme Court held four to two that a defendant had no privacy interest in a discarded belt and that generating an STR profile from it was not a search. The Court denied certiorari on March 9, 2026, at the first conference, with no amicus support and without even calling for a response from Connecticut. A denial decides nothing on the merits and sets no precedent. But it came three months before Chatrie, and opposing counsel will notice that the Court had the chance and declined it. Make the argument with that context in view rather than in spite of it.

What Actually Wins Cases: The Sample, Not the Doctrine

Constitutional arguments are worth preserving, and in most cases they will lose. The evidentiary attack is usually the better one, especially where the crime-scene evidence has been sitting in storage since the Clinton administration.

Chain of Custody on Decades-Old Evidence

A 1999 sexual assault kit has been transferred, re-inventoried, and re-boxed across multiple records systems and probably more than one building. Every one of those movements is a documented link, and the State has to be able to account for them. Ask for the complete custody record from collection forward, the storage conditions and any temperature or humidity excursions, and every prior consumption or testing event. Ask what was consumed in earlier testing and what remains for independent analysis.

Degradation and Partial Profiles

Old biological evidence degrades, and degradation does not produce a wrong answer so much as an incomplete one. Partial profiles, allelic dropout, and low template quantities all widen the statistical range and complicate interpretation. Ask how many loci actually produced results, what the analytical and stochastic thresholds were, whether any interpretation involved a mixture, and whether probabilistic genotyping software was used, because that opens its own set of questions about validation and source code.

The Confirmation Sample Itself

The fork has its own problems. Who collected it, and was it truly discarded or taken from a table the restaurant still controlled? Was it handled in a way that excludes contamination from servers, other diners, or the officer? Can the State prove the item came from this person and not from someone else at the table? Surreptitious collection happens without witnesses and without a warrant return, which means there is often less documentation than there would be for any other seizure.

The Genealogy That Pointed at Him

Do not forget the step before. Which database was searched, and did its terms of service permit law enforcement use? Was the search consistent with the Department of Justice interim policy? How many other people did the tree implicate before investigators settled on this one? Genealogy is investigative lead generation, not identification, and it should never reach a jury as though it were proof. We discuss what happens when lab work goes unexamined in our post on how forensic misconduct unravels a conviction.

What This Means for You

• Assume anything you discard in public can be collected and tested. There is no warrant requirement and no notice.
• A genealogy hit is a lead, not an identification. The confirmatory sample is where the case is actually made, and where it can be attacked.
• On decades-old evidence, chain of custody and degradation are usually stronger ground than the Fourth Amendment.
• Preserve the constitutional argument anyway. The law here is moving, and an issue not raised is an issue waived.

The technology is remarkable and it is solving cases that deserved solving. That is precisely why it earns scrutiny rather than deference. If DNA evidence is part of your case, the question is never whether the science is impressive. It is whether this sample, handled this way, actually proves what the State says it proves.

If you are facing a criminal charge in Texas involving DNA or other forensic evidence, call Deandra Grant Law at (214) 225-7117 for a free, confidential consultation.

Deandra Grant holds a Master of Science in Pharmaceutical Science, a Graduate Certificate in Forensic Toxicology, and the ACS-CHAL Forensic Lawyer-Scientist designation. Deandra Grant Law handles DNA and forensic-evidence challenges in criminal cases across North and Central Texas.

This article is general legal information for educational purposes, not legal advice. It describes a fast-developing area of law. Charges described here are allegations, and every person charged is presumed innocent. Verify all citations before relying on them in any filing.

Sources and Further Reading

• ISHI News, This Week in Forensic Science (week of Aug. 31, 2026), collecting the Collier County arrest and related identifications.
• Collier County Sheriff’s Office, DNA from Fork Leads to Arrest in 1999 Cold Case, reported by Forensic Magazine (Aug. 31, 2026).
• California v. Greenwood, 486 U.S. 35 (1988), opinion.
• Hester v. United States, 265 U.S. 57 (1924), opinion.
• Matthews v. State, 431 S.W.3d 596 (Tex. Crim. App. 2014), opinion (abandonment requires a voluntary decision and intent).
• Hulit v. State, 982 S.W.2d 431 (Tex. Crim. App. 1998), opinion.
• McCurley v. State, No. 02-19-00381-CR (Tex. App. Fort Worth Aug. 31, 2022), opinion (declining to create a DNA exception to the abandonment doctrine).
• Pollard v. State, 392 S.W.3d 785 (Tex. App. Waco 2012, pet. ref’d), opinion.
• State v. Burns, No. 21-0999 (Iowa Mar. 31, 2023), opinion (Oxley, J., dissenting).
• United States v. Davis, 690 F.3d 226 (4th Cir. 2012), opinion.
• State v. Sharpe, 353 Conn. 564 (2025), opinion, cert. denied Mar. 9, 2026.
• Maryland v. King, 569 U.S. 435 (2013), opinion.
• Carpenter v. United States, 585 U.S. 296 (2018), opinion.
• Chatrie v. United States, No. 25-112 (U.S. June 29, 2026), opinion.
• Elizabeth E. Joh, Reclaiming Abandoned DNA: The Fourth Amendment and Genetic Privacy, 100 Nw. U. L. Rev. 857 (2006).

The post Can Police Take Your DNA Off a Fork? appeared first on Deandra Grant Law – Texas Criminal Defense & DWI Defense.