Law enforcement has to request that a judge order the search, and judges won't order searches without probable cause and certain documentation. Police in California can arrest individuals with or without a warrant.Ignoring a warrant in California has consequences, including a charge of 'Failure to Appear. When can law enforcement arrest me without a warrant? The first and most important action you need to take after suspecting there is a warrant of your arrest is contacting a competent criminal defense attorney. You have the right to say no if the police ask to search you, your car, or your home without a warrant. Los Angeles criminal defense lawyers explain the California knock and announce rule requiring police to announce their presence before executing a warrant. Don't wait for the cops to arrest you! An arrest warrant is not required to make an arrest. Can cops enter your house without a warrant?