Title
Marquez vs. Sandiganbayan
Case
G.R. No. 187912-14
Decision Date
Jan 31, 2011
Parañaque officials accused of graft over overpriced ammo procurement; Supreme Court ruled denial of NBI signature examination violated due process.

Case Summary (G.R. No. 187912-14)

Key Dates

  • COA audit period: 1996–1998
  • Notices of Disallowance issued by COA Special Audit Team: post-1998
  • Appeal denied by COA: date unspecified
  • Indictments filed by Office of the Special Prosecutor: 2003
  • Formal offer of evidence by prosecution: January 13, 2006
  • Marquez’s first motion for document referral to NBI: November 24, 2003
  • Omnibus Motion (including NBI referral request): April 1, 2008
  • Motion to refer documents to NBI before 5th Division: July 4, 2008
  • SB-5th Division Resolutions denying motion: February 11 and May 20, 2009
  • Decision of the Supreme Court: January 31, 2011

Applicable Law

  • 1987 Philippine Constitution, Article III, Section 14 (due process, right to present evidence)
  • Republic Act No. 3019 (Anti-Graft and Corrupt Practices Act), Section 3(e)
  • Revised Rules of Court, Rule 129, Section 4 (judicial admissions)
  • Revised Rules of Court, Rule 132, Section 22 (proof of handwriting)
  • Rule 65 of the Rules of Court (certiorari, prohibition, mandamus)

Factual Background

The COA Special Audit Team discovered that Marquez and Caunan bypassed public bidding to purchase thousands of rounds of ammunition at grossly inflated prices from VMY Trading, an unregistered dealer. COA issued Notices of Disallowance, and subsequent appeals by Marquez and Caunan to COA were denied.

Indictment and Pre-Arraignment Motions

The Office of the Special Prosecutor found probable cause to charge both officials under Section 3(e) of RA 3019. Before arraignment, Marquez claimed that his signatures on disbursement vouchers and purchase requests were forged and sought NBI examination and reinvestigation—requests denied by the OSP.

Trial Proceedings Before the Sandiganbayan

Raffled to the 4th Division, the prosecution presented five witnesses, including COA auditors and PNP firearms experts, along with documentary evidence (vouchers, requests, authorizations). All exhibits were admitted on March 22, 2006. Caunan testified in her defense; Marquez filed an Omnibus Motion seeking the inhibition of two justices and NBI referral of documents.

Referral Motion and Prosecution’s Opposition

After recusal of two justices, the case moved to the 5th Division. On July 4, 2008, Marquez renewed his motion to send documents to the NBI’s Questioned Documents Section, alleging forgery of his signatures. The prosecution opposed, arguing (a) the documents had already been admitted; (b) Marquez never asserted forgery during the COA audit or OMB proceedings; and (c) under Rule 129, Section 4, he was estopped from contradicting prior admissions.

Sandiganbayan 5th Division’s Denial

In its February 11, 2009 Resolution, the 5th Division denied the referral, citing Rule 132, Section 22 to hold that the court could determine forgery through its own examination and that expert opinion was not indispensable. A May 20, 2009 resolution likewise denied reconsideration.

Issue for Certiorari

Marquez petitioned for certiorari, prohibition, and mandamus, contending that the denial of his motion violated his constitutional right to due process and to present evidence by arbitrarily depriving him of expert examination of allegedly forged signatures.

Supreme Court’s Legal Analysis

The Court applied the 1987 Constitution, emphasizing the accused’s right to a fair trial and reasonable opportunity to present one’s defense (Art. III, Sec. 14). Certiorari lies only to correct grave abuse of discretion amounting to lack or excess of jurisdiction—defined as arbitrary, capricious action or evasion of a positive duty.

Right to Present Evidence and Burden of Proof

Forgery, never presumed, requires proof by clear, positive, and convincing evidence, and the party alleging it bears the burden. To discharge this burden, Marquez must have a reasonable opportunity to submit his own expert evidence—here, examination by the NBI. Denial of that opportunity reduces his defense to unsubstantiated negative testimony.

Discretion of the Trial Court Versus Accused’s Rights

Although the graft court may independently examine

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