Federal law prohibiting the search of newsrooms by law enforcement and other government officials.
42 U.S.C. Sec. 2000aa:
(a) Work product materials
Notwithstanding any other law, it shall be unlawful for a government officer or employee, in connection with the investigation or prosecution of a criminal offense, to search for or seize any work product materials possessed by a person reasonably believed to have a purpose to disseminate to the public a newspaper, book, broadcast, or other similar form of public communication, in or affecting interstate or foreign commerce; but this provision shall not impair or affect the ability of any government officer or employee, pursuant to otherwise applicable law, to search for or seize such materials, if—
(1) there is probable cause to believe that the person possessing such materials has committed or is committing the criminal offense to which the materials relate: Provided, however, That a government officer or employee may not search for or seize such materials under the provisions of this paragraph if the offense to which the materials relate consists of the receipt, possession, communication, or withholding of such materials or the information contained therein (but such a search or seizure may be conducted under the provisions of this paragraph if the offense consists of the receipt, possession, or communication of information relating to the national defense, classified information, or restricted data under the provisions of section 793, 794, 797, or 798 of title 18, or section 2274, 2275, or 2277 of this title, or section 783 of title 50, or if the offense involves the production, possession, receipt, mailing, sale, distribution, shipment, or transportation of child pornography, the sexual exploitation of children, or the sale or purchase of children under section 2251, 2251A, 2252, or 2252A of title 18); or
(2) there is reason to believe that the immediate seizure of such materials is necessary to prevent the death of, or serious bodily injury to, a human being.
(b) Other documents
Notwithstanding any other law, it shall be unlawful for a government officer or employee, in connection with the investigation or prosecution of a criminal offense, to search for or seize documentary materials, other than work product materials, possessed by a person in connection with a purpose to disseminate to the public a newspaper, book, broadcast, or other similar form of public communication, in or affecting interstate or foreign commerce; but this provision shall not impair or affect the ability of any government officer or employee, pursuant to otherwise applicable law, to search for or seize such materials, if—
(1) there is probable cause to believe that the person possessing such materials has committed or is committing the criminal offense to which the materials relate: Provided, however, That a government officer or employee may not search for or seize such materials under the provisions of this paragraph if the offense to which the materials relate consists of the receipt, possession, communication, or withholding of such materials or the information contained therein (but such a search or seizure may be conducted under the provisions of this paragraph if the offense consists of the receipt, possession, or communication of information relating to the national defense, classified information, or restricted data under the provisions of section 793, 794, 797, or 798 of title 18, or section 2274, 2275, or 2277 of this title, or section 783 of title 50, or if the offense involves the production, possession, receipt, mailing, sale, distribution, shipment, or transportation of child pornography, the sexual exploitation of children, or the sale or purchase of children under section 2251, 2251A, 2252, or 2252A of title 18);
(2) there is reason to believe that the immediate seizure of such materials is necessary to prevent the death of, or serious bodily injury to, a human being;
(3) there is reason to believe that the giving of notice pursuant to a subpena duces tecum would result in the destruction, alteration, or concealment of such materials; or
(4) such materials have not been produced in response to a court order directing compliance with a subpena duces tecum, and—
(A) all appellate remedies have been exhausted; or
(B) there is reason to believe that the delay in an investigation or trial occasioned by further proceedings relating to the subpena would threaten the interests of justice.
(c) Objections to court ordered subpoenas; affidavits
In the event a search warrant is sought pursuant to paragraph (4)(B) of subsection (b) of this section, the person possessing the materials shall be afforded adequate opportunity to submit an affidavit setting forth the basis for any contention that the materials sought are not subject to seizure.