In order for authorities to search a person or property, they typically must have a search warrant or any evidence obtained through the search may be thrown out and cannot be used in criminal charges. However, according to the National Paralegal College, there are several exceptions to this rule.
The first exception occurs when a person is lawfully arrested. When this happens, authorities are permitted to search his or her person and the area within reach of the person. For example, if a person is arrested for DUI, authorities may be permitted to search the inside of the vehicle without a warrant, however, the trunk may be off limits.