You are requested to hold said person in safe and secure custody in the County Jail of. The arrest may be made with or without a warrant, depending on the circumstances.Search without warrant. A police officer may make an arrest without a warrant if the officer witnesses a crime being committed. Sometimes the police need a warrant to conduct a search or make an arrest. In this case, it is uncontested that entry into respondent's home and the seizure of the evidence subsequent to arrest carried out without a warrant. Emergency exception. The police don't need a warrant if they have a reasonable fear that their safety, or that of the public, is in imminent danger. A police officer does not need to obtain a warrant to search and seize contraband that is "in plain view. In most cases, police officers cannot enter your home without a warrant.