LOS ANGELES (CBSLA.com/AP) — A unanimous Supreme Court ruling Wednesday that generally prohibits police from searching the cellphones of people they arrest without first getting search warrants is unlikely to hinder future LAPD investigations, a police spokesman said.

In a decision (PDF) written by Chief Justice John Roberts, the court said cellphones are powerful devices unlike anything else police may find on someone they arrest. Because the phones contain so much information, police must get a warrant before looking through them, Roberts said.

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“Modern cellphones are not just another technological convenience. With all they contain and all they may reveal, they hold for many Americans the privacies of life,” Roberts said.

The court chose not to extend earlier rulings that allow police to empty a suspect’s pockets and examine whatever they find to ensure officers’ safety and prevent the destruction of evidence.

Despite the high court’s decision, KNX 1070’s Pete Demetriou reports LAPD officers said they don’t expect the ruling to hinder their ability to collect data on a smartphone for evidence, but it could lead to some changes.

“Prior to this decision, officers and investigators were able to access some of the information in a phone that could be critical to an investigation,” said LAPD Lt. Andy Neiman. “But now, we’ll do what the courts say, as we always do, and we’ll abide by their recommendations, and we’ll just have to obtain search warrants from this point forward.”

While judges and district attorney’s offices already work around the clock on expedited warrants, some critics say any delays that come as a result of the court’s ruling could allow criminals or their associates to remotely “dump” data from a smartphone.

Neiman said he doesn’t rule out that possibility.

“We’ll have to take precautions and use measures to ensure that we’re able to recover and safely secure evidence,” he said.

The Obama administration and the state of California, defending the cellphone searches, said cellphones should have no greater protection from a search than anything else police find.

But the defendants in these cases, backed by civil libertarians, librarians and news media groups, argued that cellphones, especially smartphones, are increasingly powerful computers that can store troves of sensitive personal information.

In the cases decided Wednesday, one defendant carried a smartphone, while the other carried an older flip phone.

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Roberts said the comparison to packages of cigarettes and other items that were at issue in the earlier cases is not analogous.

A ride on horseback and a flight to the moon both “are ways of getting from point A to point B, but little else justifies lumping them together,” he said.

Authorities concerned about the destruction of evidence can take steps to prevent the remote erasure of a phone’s contents or the activation of encryption, Roberts said.

One exception to the warrant requirement left open by the decision is a case in which officers reasonably fear for their safety or the lives of others.

The two cases arose following arrests in San Diego and Boston.

In San Diego, police found indications of gang membership when they looked through defendant David Leon Riley’s Samsung smartphone. Prosecutors used video and photographs found on the smartphone to persuade a jury to convict Riley of attempted murder and other charges. California courts rejected Riley’s efforts to throw out the evidence and upheld the convictions.

The court ordered the California Supreme Court to take a new look at Riley’s case.

In Boston, a federal appeals court ruled that police must have a warrant before searching arrestees’ cellphones.

Police arrested Brima Wurie on suspicion of selling crack cocaine, checked the call log on his flip phone and used that information to determine where he lived. When they searched Wurie’s home and had a warrant, they found crack, marijuana, a gun and ammunition. The evidence was enough to produce a conviction and a prison term of more than 20 years.

The appeals court ruled for Wurie, but left in place a drug conviction for selling cocaine near a school that did not depend on the tainted evidence. That conviction also carried a 20-year sentence. The administration appealed the court ruling because it wants to preserve the warrantless searches following arrest.

The justices upheld that ruling.

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