Federal Grand Jury Secrecy: Legal Principles and Implications for Congressional Oversight [January 10, 2019] [open pdf - 1MB]
"This report begins with an overview of the standards governing--and exceptions applicable to--grand jury secrecy under Federal Rule of Criminal Procedure 6(e). The report also addresses whether and how the rule of grand jury secrecy and its exceptions apply to Congress, including the circumstances under which Congress may obtain grand jury information and what restrictions apply to further disclosures. Concluding this report is a discussion of past legislative efforts to amend Rule 6(e) in order to provide congressional committees with access to grand jury materials."
CRS Report for Congress, R45456
Congressional Research Service: https://crsreports.congress.gov/