Probable cause is not just about whether evidence once existed somewhere. It is about whether the evidence is likely to be there now, when the warrant issues and the search happens. Information that was solid weeks or months ago can lose its force, and a warrant built on facts that have gone cold rests on probable cause that no longer exists. That is the staleness problem, and it turns on the dates in the affidavit.
Staleness weighs the passage of time against the nature of the crime and the evidence. The same gap can be timely in one case and stale in another.
Probable Cause Can Grow Stale
The principle is old and settled. In Sgro v. United States, 287 U.S. 206 (1932), the U.S. Supreme Court recognized that probable cause has to be current, and that a warrant cannot stand on information that has become too remote in time. The affidavit has to show a fair probability that the evidence is in the place to be searched at the time of the warrant, not merely that it was there at some earlier point. When the facts are old and nothing freshens them, the foundation for the warrant has eroded.
Probable cause can expire
Probable cause is about whether the facts still show a fair probability that evidence is there now, not merely whether they were once true. Information gets stale. A tip that someone had contraband weeks or months ago may say very little about what is in a place today, and because probable cause is judged on the totality of the circumstances, as Illinois v. Gates, 462 U.S. 213 (1983) directs, the age of the information is part of that picture. When a warrant rested on facts that were too old to still show what they once did, the affidavit no longer established present probable cause, and that gap is a real basis to challenge the search.
What Makes Information Stale
There is no calendar rule. Staleness is judged by combining the passage of time with the nature of the alleged crime and the type of evidence. A brief, one-time event supports a much shorter window than an ongoing operation, and easily consumed or moved evidence ages faster than durable records or equipment. The magistrate is supposed to weigh these together, and where the affidavit shows a long gap with no facts suggesting the evidence remains, the information has gone stale. Florida courts judge staleness by the length of the delay together with the nature of the suspected activity, so a single observation of contraband grows stale quickly while evidence of an ongoing enterprise may keep probable cause alive longer.
Why It Matters
Staleness goes to the core of the warrant, because a stale affidavit means there was no probable cause at the moment that counted. If the sworn facts were too remote and nothing in the affidavit bridged the gap to the present, the warrant should not have issued, and the search conducted under it can be challenged. Like other warrant defects, it is argued from the four corners of the affidavit, by lining up the dates and showing the probable cause had expired.
Ongoing Conduct Versus a Single Event
Time alone does not decide staleness; it depends on what the facts describe. Evidence of a single, fleeting event, like a one-time sale, can go stale quickly, because there is little reason to think it will still be there weeks later. Evidence of ongoing, continuous conduct, like a long-running operation run out of a particular place, can stay fresh longer, because the pattern suggests the evidence is still present. The nature of the items matters too, since durable records or equipment linger where perishable or easily moved evidence does not. The court weighs the passage of time against the kind of crime and the kind of evidence together.
How We Raise Staleness
Staleness is a four-corners argument. I look at the dates in the affidavit and ask when the key facts occurred, then compare that to when the warrant issued. If the affidavit relies on an observation from weeks or months earlier without anything tying the evidence to the present, that gap is the argument. The affidavit has to give the magistrate a reason to believe the evidence is there now, not that it was there once. When the sworn facts are too remote and nothing bridges the gap, the probable cause has gone stale and the warrant can be challenged.
Warrants are sometimes built on facts that were true once and no longer are, and I check the calendar as carefully as the content. As a former public defender, I look at how old the information in an affidavit was and whether it described a single moment or an ongoing situation, because probable cause has to be current, not historical. When a warrant rested on stale facts, I move to suppress what the search produced.
I started out as an Assistant Public Defender in Florida’s Thirteenth Judicial Circuit, in Tampa, and today I am one of six ACS-CHAL Forensic Lawyer-Scientists in Florida. I work both the science and the procedure in your case the way the State’s own analysts and officers are trained to, and I show a jury the exact point where the evidence does not hold up. Learn more about my background.
Questions About Staleness
What does staleness mean in a warrant?
It means the information supporting probable cause has become too old to show that evidence is still likely to be found. Probable cause has to exist at the time the warrant issues, so facts that were fresh can lose their force as time passes.
Is there a set time limit?
No. There is no fixed number of days. Staleness depends on the passage of time considered together with the nature of the crime and the type of evidence, so what is stale in one case may be timely in another.
What did Sgro v. United States decide?
The Supreme Court recognized that probable cause must be current, holding that a warrant cannot rest on information that has grown too remote in time. Sgro is a foundational statement that the facts supporting a warrant have to be timely.
Why does ongoing conduct stay fresh longer?
Because evidence of a continuing operation suggests it is still present, while evidence of a single, isolated event is more likely to be gone. Courts treat continuous, ongoing conduct as less susceptible to staleness than a one-time occurrence.
Does the type of evidence matter?
Yes. Durable items like records, equipment, or firearms tend to remain in place, while perishable or easily moved evidence does not. The more lasting the evidence, the longer the information about it may stay fresh.
How do you challenge a warrant as stale?
By examining the dates in the affidavit and showing that the key facts were too remote from the date the warrant issued, with nothing connecting the evidence to the present. If the affidavit does not show the evidence was likely still there, the probable cause was stale.
Related pages: warrants overview, probable cause and the affidavit, franks challenges, and the motion to suppress.
This page is general information, not legal advice, and it does not create an attorney-client relationship. Search and seizure in Florida is governed by the Fourth Amendment, Article I, Section 12 of the Florida Constitution, and Florida Rule of Criminal Procedure 3.190. The law changes and every case turns on its own facts. Past results do not guarantee a similar outcome.

