Criminal Law

Your Rights During a Criminal Investigation in California

Jeffrey B. Neustadt, Esq.
October 25, 2025
6 min read

Know your constitutional rights when facing criminal charges. Understanding what to say, when to remain silent, and why legal representation matters from the start.

When law enforcement begins investigating you for a crime, knowing your constitutional rights can mean the difference between protecting yourself and inadvertently providing evidence against yourself. The U.S. Constitution and California law provide important protections that every person should understand.

Your Fifth Amendment Right to Remain Silent

Perhaps the most important right you have during a criminal investigation is the right to remain silent. The Fifth Amendment protects you from being compelled to incriminate yourself. This means you are not required to answer questions from police officers, detectives, or other law enforcement personnel.

Many people believe they can "talk their way out" of an investigation or that refusing to answer questions makes them look guilty. This is a dangerous misconception. Anything you say can and will be used against you in court. Even seemingly innocent statements can be misconstrued or taken out of context to build a case against you.

If law enforcement wants to question you, you should politely but firmly state: "I am exercising my right to remain silent, and I would like to speak with an attorney." Once you invoke these rights, questioning should stop until your attorney is present.

Your Sixth Amendment Right to an Attorney

The Sixth Amendment guarantees your right to legal representation. This right applies whether you can afford an attorney or need a court-appointed public defender. You should invoke this right immediately upon any contact with law enforcement regarding a criminal matter.

An experienced criminal defense attorney serves as a buffer between you and investigators, ensuring your rights are protected and preventing you from making statements that could harm your case. Your attorney can also assess the strength of the evidence against you and advise you on the best course of action.

Never waive your right to an attorney because you think it makes you look guilty or because investigators promise leniency if you cooperate. Law enforcement officers are legally permitted to use deception during interrogations, and promises made during questioning are not binding.

Your Fourth Amendment Protection Against Unreasonable Searches

The Fourth Amendment protects you from unreasonable searches and seizures. Law enforcement generally needs a warrant based on probable cause to search your home, vehicle, or personal belongings. However, several important exceptions exist.

Police can conduct a search without a warrant if you consent to the search, if evidence is in plain view, if the search is incident to a lawful arrest, if there are exigent circumstances (emergency situations), or if they have probable cause to search a vehicle. Because of these exceptions, it's crucial to understand that you have the right to refuse consent to a search. If officers ask to search your home or vehicle, you can politely decline by saying, "I do not consent to any searches."

If police proceed with a search despite your refusal, do not physically resist. Instead, clearly state your lack of consent and allow your attorney to challenge the legality of the search later in court.

What to Do During a Police Encounter

If police stop you or want to question you, remain calm and polite. Provide your identification if requested (California law requires you to identify yourself in certain circumstances), but beyond basic identification, exercise your right to remain silent. Do not answer questions about where you've been, what you've been doing, or anything related to potential criminal activity.

Ask clearly: "Am I free to leave?" If the officer says yes, calmly walk away. If the officer says no, you are being detained or arrested. At this point, invoke your rights by stating: "I am exercising my right to remain silent and my right to an attorney."

Never run from police, physically resist, or make threatening movements. These actions can lead to additional charges and potentially dangerous situations.

Understanding Miranda Rights

You've likely heard of Miranda rights from television shows, but it's important to understand when they apply. Police must read you your Miranda rights before conducting a custodial interrogation—that is, questioning you while you're in custody and not free to leave.

However, police are not required to read Miranda rights during casual conversations, traffic stops (unless you're arrested), or when asking routine booking questions. Don't assume that because you haven't been "Mirandized," anything you say can't be used against you. The safest approach is to exercise your right to remain silent from the very beginning of any law enforcement contact.

Special Considerations for Different Situations

DUI Stops: California's implied consent law means that by driving in California, you've agreed to submit to chemical testing if arrested for DUI. Refusing can result in automatic license suspension and can be used against you in court. However, you still have the right to remain silent regarding other questions.

Search of Electronic Devices: Police generally need a warrant to search your cell phone or computer. You are not required to provide passwords or unlock your devices. Invoke your Fifth Amendment right against self-incrimination if asked to provide access to encrypted devices.

Workplace Investigations: If you're being investigated for a crime related to your employment, you still have constitutional protections. Don't assume that because your employer is involved, you must answer questions without an attorney present.

Why Early Legal Representation Matters

The earlier you involve an attorney in a criminal investigation, the better. An attorney can communicate with law enforcement on your behalf, potentially preventing charges from being filed, ensure that any statements you do make are carefully considered and strategic, protect you from investigative tactics designed to elicit incriminating statements, and begin building your defense immediately.

Many people make the mistake of waiting until they're formally charged to hire an attorney. By then, they may have already made damaging statements or taken actions that complicate their defense.

Moving Forward

Facing a criminal investigation is frightening, but understanding and exercising your constitutional rights is essential to protecting yourself. Remember these key points: you have the right to remain silent—use it; you have the right to an attorney—invoke it immediately; you have the right to refuse consent to searches; and anything you say can be used against you, even if you think it's helpful.

If you're under investigation or have been contacted by law enforcement, contact an experienced criminal defense attorney immediately. Early intervention can make a significant difference in the outcome of your case.

About the Author

Jeffrey B. Neustadt, Esq. has been practicing law in the San Francisco Bay Area for over 50 years. His practice focuses on civil, criminal, and family law. Jeffrey is admitted to the California State Bar (#57889) and graduated from Boston College Law School.

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