The Cespedes Law Firm, L.C. has an office in Diamond Bar, serving clients across the eastern San Gabriel Valley and the Pomona Valley. Attorney Armando Cespedes and his team defend people facing DUI and criminal charges, in English and Spanish, from the first phone call through resolution. If you or someone you love was arrested in Diamond Bar, Walnut, Rowland Heights, or a nearby community, the Diamond Bar office is the closest place to sit down and talk through what happens next.
Who Handles an Arrest in Diamond Bar
Diamond Bar does not have its own police department. The City of Diamond Bar[1] contracts with the Los Angeles County Sheriff's Department for law enforcement, and deputies work out of the Walnut/Diamond Bar Sheriff's Station on Valley Boulevard in Walnut. That station also covers Walnut, Rowland Heights, and nearby unincorporated areas. An arrest in any of these communities usually starts with a report from that station, and the report is often the first thing a defense attorney reviews.
Cases are prosecuted by the Los Angeles County District Attorney's Office. That matters because charging practices, diversion options, and plea policies differ from those in San Bernardino County, even though the Chino Hills border is only a few miles away.
Where Diamond Bar Cases Go to Court
Diamond Bar sits in the East District of the Los Angeles County Superior Court, which includes the Pomona and West Covina courthouses[2]. Depending on the charge and how the case is filed, a Diamond Bar arrest is typically arraigned at one of these East District courthouses. The most serious felony cases may be sent to specialized courts downtown. Under Penal Code 825[3], a person held in custody must be brought before a judge without unnecessary delay, so the first court date often comes quickly.
DUI Arrests in Diamond Bar
Stops along the 57 and 60 freeways and on Diamond Bar Boulevard account for many DUI arrests in the area. Every DUI arrest opens two cases at once: a criminal case in court and a separate license case with the DMV. You generally have just 10 days from the arrest to request a DMV Administrative Per Se hearing[4] before your license is suspended automatically. Our DUI defense practice covers everything from a first-time DUI to a felony DUI.
Criminal Charges We Defend in Diamond Bar
The Diamond Bar office handles the full range of criminal defense matters, including:
- Domestic violence and assault and battery
- Theft and shoplifting
- Drug crimes and weapons violations
- Wobblers, which can be charged as either a misdemeanor or a felony
Arrested in Diamond Bar? Talk to Us Today
The first days after an arrest shape everything that follows. The Cespedes Law Firm, L.C. is headquartered in Chino Hills and represents clients in English and Spanish throughout California.

