When an officer says “187” over the radio in California, they’re naming the most serious crime there is. It’s the number police use for a homicide, and it comes straight from the law itself. This article explains what the 187 police code means, how officers actually use it on the air, why California names crimes by their statute numbers when most of the country doesn’t, and the important limit on where the code applies.
The short answer: 187 is Section 187 of the California Penal Code, which defines murder. California law enforcement uses “187” on the radio, and in reports as shorthand for a homicide, and from there the number spread far beyond policing into everyday slang.
What 187 Means on the Radio
In California, officers don’t reach for a ten-code to report a killing. They say the penal code section number directly. “We have a 187” tells everyone on the channel that there’s a homicide — an unlawful killing — without any further explanation needed. The number is the crime, because it’s the exact section of California law that defines murder.
This is a different way of speaking than you’ll hear in much of the country. Where a New York officer might use a ten-code to flag a crime, and a Florida officer might use a signal, a California officer names the statute. It’s compact and precise, and it maps cleanly onto the paperwork and, eventually, the charge. When the report is written and the case moves toward prosecution, the same number that went out over the radio carries through the whole system.
Because 187 sits at the top of the severity scale, it carries weight the moment it’s spoken. A 187 call means detectives, a secured scene, a coroner, and a major investigation. Everything about the response scales up. For the broader picture of how California’s radio language works, our overview of US police codes sets the context.
Why California Uses Penal Codes as Radio Shorthand
California law enforcement leans on Penal Code section numbers in a way that’s unusual nationally. The habit turns the criminal code into a radio vocabulary: officers memorise the section numbers for common crimes and use them as everyday shorthand. It’s efficient for the same reason ten-codes are — it compresses a whole phrase into a few syllables — but it has the added advantage of tying the radio traffic directly to the law.
187 is the most famous of these, but it lives in a whole family of spoken penal codes:
| Code | Crime (California Penal Code) |
|---|---|
| 187 | Homicide/murder |
| 207 | Kidnapping |
| 211 | Robbery |
| 240 | Assault |
| 242 | Battery |
| 245 | Assault with a deadly weapon |
| 415 | Disturbing the peace |
| 451 | Arson |
| 459 | Burglary |
| 487 | Grand theft |
Notice that 187 is the gravest entry on the list, which is part of why it lands so hard when it’s spoken. An officer working a California channel might combine one of these with a response code and other shorthand — “Code 3, we have a 211 in progress” — stacking several code families in a single transmission. Our US 10-codes guide explains how these families relate to one another.
How Officers Use 187 in Practice
A 187 rarely travels alone on the radio. It’s usually surrounded by the codes that manage the response. You might hear it paired with a Code 4 once the scene is secure, a request to clear the air for emergency traffic, or a call for detectives and a coroner. Officers may also use variations built on the number: 664/187 references an attempted murder, since 664 is the California section for attempts, and you’ll occasionally hear a 187 qualified with detail about a suspect still outstanding.
Because a homicide is the most serious call a patrol officer handles, the discipline around a 187 is tight. The scene gets locked down, evidence is protected, witnesses are separated, and the investigation is handed to specialists. The single spoken number kicks off a chain of carefully defined procedures, which is exactly the efficiency the penal-code shorthand is built to deliver.
The Limit: 187 Is a California Code
Here’s the crucial boundary. As an official code and legal code, 187 is specific to California. It’s California Penal Code Section 187, and it means murder because that’s the section of California’s law that defines the crime. Other states organise their criminal codes differently, and murder carries an entirely different section number in each of them. A homicide in Texas, New York, or Florida is not a “187” under those states’ law.
So an officer outside California generally wouldn’t use 187 as an official code, because it isn’t part of their penal code. If you hear “187” on a scanner, its official use points to California or to an agency that has borrowed California’s penal-code radio conventions. Elsewhere, the number has no formal standing — even though, as we’ll see, almost everyone recognises it anyway.
This is a specific instance of the pattern that runs through all American police radio: there is no national code book, and meanings are tied to the jurisdiction that assigns them. A number that’s precise and official in one state can be meaningless as a code across the line. Our US police code category lays out how these systems vary, and the master police code lists page collects them in one place.
How 187 Escaped Into the Wider World
Most penal-code numbers stay inside police work. 187 broke out and became one of the most recognised numbers in American slang, largely through West Coast hip-hop in the late 1980s and 1990s. Artists used “187” to reference a killing, and once it was embedded in the music, it spread into film, television, and games. A 1997 film was titled simply 187. The number turns up in lyrics, titles, and street slang as blunt shorthand for murder or a death threat.
The result is a strange split. As an official code, 187 belongs to California. As slang, it’s understood almost everywhere, by millions of people who have never heard a police scanner and couldn’t name the statute it comes from. Someone in Chicago or London might recognise “187” as meaning murder while their local police would never use it on the radio. The cultural meaning detached from the legal one and travelled on its own.
Keeping the two separate matters for accuracy. The slang is universal; the official code is jurisdiction-specific. Confusing them leads people to assume 187 is a nationwide police code, which it isn’t.
Why Understanding 187 Matters
For scanner listeners in California, 187 is a code to recognise immediately — it signals the most serious call on the channel. For writers and journalists, using it accurately means knowing it’s a California statute, not a universal code, and that a character calling a “187” in a Texas or New York setting is a small but real error. And for anyone curious about how police communicate, 187 is a clear window into California’s distinctive habit of speaking the law itself over the radio.
The number carries a particular gravity because of what it names. Behind every real 187 is a death and the people affected by it, which is worth remembering when a piece of radio shorthand becomes a pop-culture catchphrase. The code is efficient precisely because the crime it names needs no elaboration — everyone who hears it understands exactly how serious the moment is.
Using Police Code to Explore Further
Police Code is a global police code explorer built to answer questions exactly like this one — what a code means, and crucially, where it means it. Instead of assuming 187 is a universal police code because it’s famous, you can search one organised database that shows which jurisdictions use it officially, how it relates to other penal codes, and how California’s system compares to the rest of the country and the world. It’s free to browse and built for scanner listeners, journalists, writers, and anyone who wants a code’s meaning to be right rather than roughly right.
If this topic touches something difficult for you personally — grief, or the aftermath of violence — it’s okay to step away from the subject, and support is available through people and services you trust.