Your cellphone may contain years of private information—text messages, photographs, emails, financial records, medical information, contacts, passwords, and location history. Because phones can also contain evidence of criminal activity, law enforcement frequently seeks to seize them during investigations.
But can police simply ask you to hand over your phone? Yes, they can ask. But that does not necessarily mean you are legally required to give it to them. If you voluntarily hand your phone to police, law enforcement may later argue that you consented to them taking possession of it. If you do not consent, police generally need some other lawful basis to seize the phone, such as a warrant, a lawful arrest, probable cause combined with circumstances justifying an immediate seizure, or a genuine emergency.
Just as important, there is a legal difference between taking possession of your phone and searching the information inside it.
Taking Your Phone Is a Fourth Amendment Seizure
The Fourth Amendment protects people against unreasonable searches and seizures. When law enforcement takes possession of your cellphone and prevents you from using or controlling it, the taking may constitute a seizure of your property. Police therefore ordinarily need some lawful justification for taking the phone.
Here are several situations in which law enforcement may be permitted to take possession of a cellphone:
You Consent to Giving Police Your Phone
One of the most frequently overlooked ways police obtain a cellphone is simply by asking for it. An officer may say:
“Can you give me your phone?”
“Would you mind leaving your phone with us?”
“We just need to hold onto your phone for a while.”
Police generally do not need probable cause merely to ask for your phone. If you voluntarily agree and hand it over, law enforcement may argue that you consented to the seizure.
But consent has limits. Agreeing that police may temporarily possess your phone does not necessarily mean you have agreed to let them search every text message, photograph, email, application, or other piece of information stored inside it. What the officer asked, what you said, and what you reasonably agreed to can become extremely important.
Police Have a Search Warrant
The clearest situation occurs when officers have a valid search warrant authorizing them to seize the cellphone. A warrant generally must be supported by probable cause establishing a connection between suspected criminal activity and the phone or information investigators expect to find on it.
You Are Lawfully Arrested
Police may generally take physical possession of property found on you following a lawful arrest, including your cellphone. However, there is an extremely important limitation:
Taking the phone does not automatically give police permission to search through it.
In Riley v. California, the United States Supreme Court held that police generally must obtain a warrant before searching the digital contents of a cellphone seized from an arrested person.
The Court recognized that modern smartphones contain an enormous amount of highly personal information and cannot simply be treated like an ordinary object found in someone's pocket.
Police Have Probable Cause and Need to Secure the Phone
There may be situations where officers have probable cause to believe a cellphone contains evidence of a crime and temporarily secure the device while they seek a search warrant. For example, police may argue that taking possession of the phone was necessary to prevent evidence from being destroyed, altered, or lost while officers obtained judicial authorization.
However, the fact that a phone might contain evidence does not automatically permit police to seize it without a warrant. The surrounding circumstances matter, including what officers knew at the time they took possession of the device and why immediate seizure was supposedly necessary.
Even when officers are permitted to secure the phone, they still need separate lawful authority—usually a warrant—before searching its digital contents.
Exigent Circumstances or a Genuine Emergency
Police may sometimes act without first obtaining a warrant when exigent circumstances require immediate action. This can include a genuine emergency involving an imminent threat to someone's life or safety, or in some situations an immediate and specific risk that evidence will be destroyed before officers can obtain a warrant.
However, the fact that information on a cellphone could theoretically be deleted or remotely wiped does not automatically create an emergency. Police may instead be able to secure the phone and prevent access to it while obtaining a search warrant. Whether exigent circumstances justified taking or searching a phone depends on the specific facts confronting officers at the time and whether there was a genuine need for immediate action.
What If You Are Not Under Arrest?
Suppose detectives are investigating you, but you have not been arrested. They do not show you a warrant, and there does not appear to be an emergency.
An investigator then says: “Give me your phone. We'll get it back to you.”
You should not assume that the officer's request means you are legally required to comply. If police do not have a warrant or some other lawful basis to seize the phone, your voluntary agreement may become the government's justification for taking possession of it.
A person who does not wish to consent can clearly say: “I do not consent to the seizure or search of my phone.”
You should never physically resist an officer who takes the phone. Whether the seizure was lawful can later be challenged in court.
Seizing the Phone and Searching the Phone Are Different
This is one of the most important distinctions in cellphone cases.Police may sometimes have legal authority to take possession of a phone without having legal authority to immediately search its contents.
California's Electronic Communications Privacy Act also places restrictions on government access to electronic communications and electronic-device information and recognizes circumstances such as warrants, specific consent, and certain emergencies.
Therefore, when cellphone evidence becomes important in a criminal case, two separate questions should be examined: Was the phone lawfully seized ? And: Was the information inside the phone lawfully searched? Those are not necessarily the same question.
Even if police later obtained a search warrant, a defense attorney should still examine what happened before the warrant was issued, including how officers originally obtained possession of the phone and whether that initial seizure complied with the Fourth Amendment.
Was Your Cellphone Lawfully Seized or Searched?
If police seized your cellphone during a criminal investigation, the entire sequence should be examined carefully. Did officers have a warrant? Were you arrested? Did you voluntarily hand them the phone? Was there probable cause and a legitimate reason to immediately secure it? Was there a genuine emergency? And what exactly happened before officers eventually searched the device?
At Stephen G. Rodriguez & Partners, we examine not only what police found on a cellphone, but how they obtained the phone in the first place.
If law enforcement seized or searched your cellphone in connection with a criminal investigation in Los Angeles, contact Stephen G. Rodriguez & Partners at 213 481-6811to discuss your rights and whether the evidence may be challenged.