In Jacksonville and all of Florida, in order to get a search warrant, the police need to sign a sworn affidavit. The affidavit has to establish a substantial basis establishing probable cause that illegal activities are taking place in a location. There has to be a fair probability illegal substances, such as drugs, or evidence of a crime will be found in the place to be searched.
For example, when drugs are found in a house as a result of a search warrant in Jacksonville, people in the house are arrested on drug charges. A Jacksonville Criminal Defense Lawyer can file a Motion to Quash the Search Warrant if he or she believes that the warrant was not supported by facts establishing probable cause to believe drugs would be found in the house.