Tennessee Writes No Car-Search Consent Rule, but Your Phone Needs a Warrant

The negative here is worth stating precisely, because it is proved from what the Tennessee Code contains rather than from silence. The phrase "consent to search" appears in exactly one section of the Code, § 40-7-121, which governs body cavity searches and requires a warrant unless the person signs a printed waiver form whose language the statute itself sets out. The phrase "constitute probable cause" appears twice, at § 40-28-121 on parole revocation and § 8-6-112 on prosecutions of judges, and neither concerns a vehicle. Searching for the word search within ten words of vehicle in combination with consent returns only § 55-20-308, the yellow dot decal program for first responders, and § 39-13-609, the Freedom from Unwarranted Surveillance Act on police drones. There is no Tennessee counterpart to the clauses that California, New York and Michigan attached to cannabis legalization.

What Tennessee does regulate, in unusual detail, is the phone in your hand. Tenn. Code Ann. § 40-6-110 was added by Acts 2014, ch. 785 and covers "any data that is stored in a cellular telephone including telephone numbers, addresses, pictures, documents, texts, videos, music and any other information." Subsection (b) forbids an officer from searching, examining, extracting or duplicating that data even incident to a lawful arrest unless one of three things is present: a search warrant issued under Title 40, Chapter 6, Part 1 or Rule 41 of the Tennessee Rules of Criminal Procedure; informed consent from the owner or the person in possession of the phone at the time it is seized; or exigent circumstances at the time of the seizure.

Two details in that list do real work at a traffic stop. The consent standard is "informed consent," not mere acquiescence, and the person who can give it is the owner or whoever was holding the phone when it was seized, so a passenger can consent to a search of the passenger's own handset. The remedy in subsection (c) is broader than the ordinary exclusionary rule: data obtained in violation of the section may not be used "in any court of law or administrative board," and neither may other evidence derived from it. Subsection (d) removes the protection only for a phone that has been abandoned by its owner.

If the car itself is searched unlawfully, Tennessee's remedy is narrower than in most states. The Exclusionary Rule Reform Act of 2011, codified at § 40-6-108, says evidence seized while executing a search warrant shall not be suppressed for a violation of Part 1 or of Rule 41 where the court finds a good faith mistake or technical violation. Subsection (c) defines that term as an unintentional clerical error or omission in the form, preparation, issuance, filing or return of the warrant; execution by an officer other than the one to whom the warrant was delivered but who has law enforcement authority over the premises; or reasonable reliance on a statute later ruled unconstitutional or on controlling precedent later overruled. Subsection (b) also removes civil liability for the officer or agency in those same circumstances.

A few adjacent Tennessee rules round out the picture. Since 2021 a Tennessee magistrate may not issue a no-knock search warrant at all: § 40-6-105(b), added by Acts 2021, ch. 489, § 5, forbids a warrant that expressly authorizes an officer to dispense with knocking and announcing. Blood and breath testing during a DUI stop has its own consent scheme at § 55-10-406 rather than falling under general search law. And whatever you think of the search, do not obstruct it: § 39-16-602(b) provides that it is no defense to a resisting charge that the search was unlawful, except as provided in § 39-11-611. Refusing consent is not obstruction, and the officer needs no consent to demand your license under § 55-50-351(a).

The consequence of an unlawful phone search runs against the state, not the driver. Under § 40-6-110(c) cellular telephone data obtained in violation of the section may not be used as evidence in any court of law or administrative board, and evidence derived from that data is excluded with it, so the remedy is a suppression motion filed in the criminal case. Where a car is searched under a defective warrant, § 40-6-108(a) allows the evidence in anyway if the court finds a good faith mistake or technical violation as defined in subsection (c), and § 40-6-108(b) bars civil liability in the same circumstances, leaving a federal civil rights action as the main alternative.

Refusing consent is not itself an offense and no Tennessee statute penalizes it, but using force to prevent a search is prosecuted under § 39-16-602 as a Class B misdemeanor, or a Class A misdemeanor when a deadly weapon is used, punishable under § 40-35-111(e) by up to six months and five hundred dollars, or eleven months twenty-nine days and two thousand five hundred dollars, respectively.