§ 552 (b)(7), FOIA rights are ruled out for ‘records or information compiled for law enforcement purposes, but only to the extent that the production of such law enforcement records or information (A) could reasonably be expected to interfere with enforcement proceedings, (B) would deprive a person of a right to a fair trial or an impartial adjudication, (C) could reasonably be expected to constitute an unwarranted invasion of personal privacy, (D) could reasonably be expected to disclose the identity of a confidential source, including a State, local, or foreign agency or authority or any private institution which furnished information on a confidential basis, and, in the case of a record or information compiled by criminal law enforcement authority in the course of a criminal investigation or by an agency conducting a lawful national security intelligence investigation, information furnished by a confidential source, (E) would disclose techniques and procedures for law enforcement investigations or prosecutions, or would disclose guidelines for law enforcement investigations or prosecutions, if such disclosure could reasonably be expected to risk circumvention of the law, or (F) could reasonably be expected to endanger the life or physical safety of any individual.’ Also, ‘[w]henever a request is made which involves access to records [the production of which could reasonably be expected to interfere with enforcement proceedings] and– (A) the investigation or proceeding involves a possible violation of criminal law; and (B) there is reason to believe that (i) the subject of the investigation or proceeding is not aware of its pendency, and (ii) disclosure of the existence of the records could reasonably be expected to interfere with enforcement proceedings, the agency may, during only such time as that circumstance continues, treat the records as not subject to the requirements of this section.’ (5 U.S.C. § 552 (c)(1)). 
 Asimismo, cuando se presente una solicitud que implique el acceso a registros cuya obtención pueda razonablemente esperarse que interfiera con los procedimientos de ejecución, y a) la investigación o procedimiento se refiere a un posible delito penal, y b) haya razones para creer que: i) el sujeto de la investigación o procedimiento no tiene conocimiento del mismo, y que ii) la revelación de la existencia de los registros permita razonablemente pensar que interferirá con los procedimientos de ejecución, la agencia podrá, solo durante el tiempo en que se dé esta circunstancia, tratar los registros como si no estuviesen sujeto a los requisitos de este artículo [USC, título 18, artículo 552, letra c), inciso 1]. 

Term pairs: enforcement: ejecución: 1.0, investigation: investigación: 0.9967, enforcement proceedings: procedimientos de ejecución: 0.8505, subject of the investigation: sujeto de la investigación: 0.809, procedures: procedimientos: 0.7969, possible violation: posible delito: 0.7282, criminal law: delito penal: 0.7226, requirements: requisitos: 0.6763, existence of the records: existencia de los registros: 0.6578, requirements of this section: requisitos de este artículo: 0.641, agency: agencia: 0.6268, disclosure: revelación: 0.6185, access to records: acceso a registros: 0.5923, disclosure of the existence: revelación de la existencia: 0.5463