How Police Obtain Search Warrants
Police officers obtain search warrants by convincing a judge or magistrate that they have "probable cause" to believe that criminal activity is occurring at the place to be searched
or that evidence of a crime may be found there. Usually, the police provide the judge or magistrate with information in the form of written statements under oath, called "affidavits," which report either their own observations, or those of private citizens or police undercover informants. If the magistrate believes that the affidavit establishes probable cause to conduct a search, he or she will issue a warrant.
BBM
http://www.nolo.com/legal-encyclopedia/search-warrant-basics-29742.html
Without the affidavit(s), we can not surmise the intent of the search and Dylan being last seen there (as reported by MR) is enough in itself.
Sorry I didn't rely on wiki.