Title
Bengzon Jr. vs. Senate Blue Ribbon Committee
Case
G.R. No. 89914
Decision Date
Nov 20, 1991
Petitioners sought to block Senate Blue Ribbon Committee's inquiry into alleged ill-gotten wealth, claiming rights violation; SC upheld Committee's legislative authority.

Case Summary (G.R. No. 80447)

Key Dates and Prior Proceedings

• February 28–March 3, 1986: Alleged sale of 36–39 Romualdez-controlled corporations to PNI Holdings for ₱5 million
• July 30, 1987: PCGG files Sandiganbayan Civil Case No. 0035 against Benjamin “Kokoy” Romualdez et al., impleading petitioners
• 2–6 August 1988: Press reports on disposition of “Romualdez corporations”
• 13 September 1988: Senator Enrile delivers privilege speech urging inquiry into possible RA 3019 violations by President’s relatives
• 23 May 1989: Senate Blue Ribbon Committee hearing; petitioners and Lopa invoke due-process/self-incrimination rights and refuse to testify
• 5 June 1989: Committee resolution rejecting pleas and ordering continuation of inquiry
• 21 December 1989: Court grants intervention of Jose S. Sandejas
• November 20, 1991: Supreme Court issues decision

Applicable Constitutional and Statutory Provisions

• 1987 Constitution, Article VI, Section 21 – “inquiries in aid of legislation” must follow published rules and respect rights of persons appearing or affected
• Senate Rules of Procedure Governing Inquiries in Aid of Legislation (Sections 1 and 4)
• Bill of Rights, Article III, Section 17 – right against self-incrimination; Section 1, due-process guarantees
• Republic Act No. 3019, Section 5 – prohibition on certain relatives engaging in government business

Factual and Procedural Background

The PCGG, assisted by the Solicitor General, seeks recovery of alleged ill-gotten wealth from Romualdez-controlled enterprises through Sandiganbayan Civil Case No. 0035. The Second Amended Complaint charges, among other schemes, a March 3, 1986 “fictitious sale” of Romualdez corporate interests to PNI Holdings (linked to petitioners’ law firm and FMMC/PNI managers) to evade PCGG sequestration. While answers were on file in the Sandiganbayan, the Senate Blue Ribbon Committee—prompted by Senator Enrile’s privilege speech and a referral by Senator Mercado—subpoenaed petitioners to testify on the same transactions. Petitioners moved for prohibition, claiming no valid legislative purpose, pre-emption by the Sandiganbayan, and violation of due-process and self-incrimination rights.

Jurisdiction to Review Legislative Investigations

Respondents argued that separation of powers precludes judicial inquiry into legislative motives. The Court held that under Angara v. Electoral Commission and subsequent authority, it has the duty to delimit constitutional boundaries, including the extent of congressional investigative power, and may intervene when constitutional limitations are transgressed.

Scope and Limits of “In Aid of Legislation”

The 1987 Constitution expressly empowers either House or its committees to conduct inquiries in aid of legislation, subject to published procedural rules and respect for individual rights. An inquiry must be material or necessary to a power vested by the Constitution, determined by examining the speech or resolution authorizing it.

Lack of Valid Legislative Purpose

Senator Enrile’s speech sought merely “to look into” alleged RA 3019 violations by President’s relatives in connection with the sale of Romualdez corporations—without proposing or re-examining legislation. Senate Resolution No. 212, aimed at the PCGG’s performance, did not encompass the Enrile-triggered inquiry into private transactions by non-government actors. Thus the Committee’s investigation lacked the requisite legislative nexus.

Pre-emption by Judicial Proceedings

The same subject matter—the March 1986 sale and alleged concealment of Romualdez assets—was squarely before the Sandiganbayan, which had acquired jurisdiction upon filing of the Second Amended Complaint and answers by petitioners. Permitting concurrent legislative inqui

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