Suppressing Evidence From a K9 Search During a Traffic Stop

Q: Can police extend a traffic stop to bring in a drug-sniffing dog?

Generally no — once the reason for the traffic stop is resolved, police cannot prolong the stop for a dog sniff without independent reasonable suspicion of other criminal activity. How courts apply that rule is highly fact-specific and turns on the timeline of the stop.

Q: Does a dog "alerting" on a car automatically make a search legal?

Not automatically. Courts examine factors such as the dog's training and reliability record and whether the stop was still lawful at the point of the alert. An alert is generally treated as one factor supporting probable cause rather than an automatic authorization for any search.

Q: What is a motion to suppress, and what happens if it succeeds?

A motion to suppress asks the court to exclude evidence obtained through an unconstitutional search or seizure. If granted, the excluded evidence generally cannot be used against the defendant at trial, which can substantially weaken or end the prosecution's case depending on what other evidence exists.

Question

I was pulled over cause of my windows tent in my car. I wasn't on probation. My DL was valid with tags and insurance. The cops asked to search my car, and I told him no. He told me it was a free country and he was going to walk his k9 dog around my car. He asked me to step out of the car and he detained me while his dog walked around my car. Then he said his dog told him there was drugs in my car so he searched my car. He found no drugs no weapons nothing illegal. He found a empty jewelry box and he called another officer and he came down and said it was part of a burglary. Now months later I am being charged with 1st degree burglary. Is the jewelry box they found in my legal to use as evidence? And was that an illegal search

A. Jason Velez · Accepted Answer

Whether that jewelry box can be used against you turns on whether the officer unlawfully extended your traffic stop to bring in the drug dog, and the way to challenge it is a formal motion to suppress filed at the right stage of the case — not something raised informally as the case moves forward.

The Fourth Amendment to the U.S. Constitution protects against unreasonable searches and seizures. Courts applying it have held that once the reason for a traffic stop is resolved — here, your license, tags, and insurance were reportedly all valid — police generally cannot prolong the stop to conduct a dog sniff without independent reasonable suspicion of other criminal activity by that point. United States v. Evans (9th Cir. 2015) 786 F.3d 779 applied that rule to facts close to yours, holding that an officer's prolongation of a traffic stop to run an ex-felon registration check and a dog sniff violated the Fourth Amendment unless the officer had independent reasonable suspicion to justify the added time. Be precise about its weight: it is a Ninth Circuit decision, so it binds the federal courts in California and is persuasive rather than binding authority in a California state court, which is where a burglary charge like yours is prosecuted. Note too what Evans did not do — it sent the case back for the trial court to decide whether independent reasonable suspicion actually existed, so it supplies the rule rather than standing as an example of evidence finally being thrown out. That rule about the permissible length and scope of a stop comes from case law interpreting the Fourth Amendment, not from the amendment's text, which is precisely why the details of when and for how long you were detained matter so much.

Penal Code § 1538.5 is California's procedural mechanism for challenging evidence obtained through an unreasonable search or seizure, including a warrantless search or seizure like this one. Timing matters: a misdemeanor motion is generally made before trial, while in a felony case such as a first-degree burglary charge the motion is typically brought at the preliminary hearing or through a later special hearing. Missing the right stage can cost you the challenge regardless of its merits.

What you can do

1. Get a criminal defense attorney involved immediately, since a motion to suppress in a felony case must be filed and argued at a specific procedural stage.

2. Request and preserve all body-camera and dash-camera footage from the stop, including timestamps showing how long you were detained before the dog arrived and how long the sniff took.

3. Obtain the police report and any K9 deployment or alert records showing what the officer cited as justification for extending the stop.

4. Have your attorney evaluate whether the length of the stop and the stated basis for the search meet the standard courts require before evidence found afterward can be used.

5. Do not discuss the facts of the stop or the case with investigators without your attorney present.

Suppressing Evidence From a K9 Search During a Traffic Stop

Start a free AI-assisted chat and connect with an experienced California attorney, with no obligation.

Legal Inquiry

Courts & Legal Aid in California

Frequently Asked Questions