Title
People vs. Umanito
Case
G.R. No. 172607
Decision Date
Apr 16, 2009
Rufino Umanito’s rape conviction was upheld after DNA testing confirmed a 99.9999% paternity probability, overriding his alibi defense. His appeal withdrawal affirmed the verdict, closing the case.
biological father
rape
alibi

Case Summary (G.R. No. 172607)

Factual Background

The private complainant, referred to in the record as AAA, alleged that she was raped by the accused in 1989. The alleged sexual assault resulted in her pregnancy and the birth of a female child, hereinafter referred to as BBB. The accused, Rufino Umanito, maintained a defense of alibi and asserted that although he courted AAA they were not lovers and he did not engage in sexual intercourse with her. The trial court found Umanito guilty beyond reasonable doubt of rape, sentenced him to reclusion perpetua, and ordered indemnity of P50,000 to the private complainant. The Court of Appeals affirmed that conviction.

Procedural History and Supreme Court Remand

On appeal to the Supreme Court, the Court observed inconsistencies in the parties’ accounts and identified paternity of BBB as potentially determinative of the appeal. In its Resolution dated 26 October 2007, the Supreme Court directed application of the newly promulgated DNA Rules and remanded the case to the RTC for reception of DNA evidence under those rules. The Court further tasked Deputy Court Administrator Reuben Dela Cruz to monitor implementation of the DNA Rules in the remand proceeding and to submit periodic reports to the Court.

Trial Court Preparations and Preliminary Hearings

Upon receipt of the Supreme Court Resolution on 9 November 2007, the RTC set hearings to assess feasibility of DNA testing in accordance with Sections 4(a), (b), (c) and (e) of the DNA Rules. At the initial hearings, AAA and BBB testified and manifested willingness to submit to DNA testing. The public prosecutor and counsel for Umanito agreed to the selection of the National Bureau of Investigation (NBI) as the laboratory to perform the DNA testing. The RTC issued an order directing biological samples to be taken and expressly enjoined the NBI to follow safeguards to preserve the integrity and chain of custody of the samples, to withhold disclosure of results prior to simultaneous disclosure in court, and to preserve DNA profiles and related information.

Sample Collection and Observers

DNA sample collection occurred in court for AAA and BBB on 9 January 2008 and at the New Bilibid Prisons for Umanito on 8 February 2008. Sampling was performed by NBI forensic chemist Mary Ann Aranas and a laboratory technician. The proceedings were observed by Judge Ferdinand A. Fe, the prosecutor, counsel for the defense, Deputy Court Administrator Reuben Dela Cruz, and other court and penal institution personnel. The trial court had earlier noted logistical arrangements and the need for special permission to permit Umanito to attend hearings at the RTC, which was not required once samples were obtained at his place of detention.

Forensic Procedure and Expert Testimony

The prosecution presented NBI forensic chemist Mary Ann Aranas as an expert in DNA testing. She described the sampling procedure that included buccal swabs and five drops of blood on FTA paper, photographic identification, repeated swabbing, labeling, signing by subjects and witnesses, air-drying, sealing with tape, and multiple signatures and fingerprint marks on the sealed envelopes to establish the chain of custody. The NBI laboratory employed the PowerPlex 16 System, which analyzes sixteen loci, with paternity matching concentrated on fifteen loci. Laboratory procedures included sampling, extraction, PCR amplification, and analysis with a genetic analyzer. Duplicate analyses and separate processing of buccal and blood samples were performed to ensure reliability.

DNA Results and Admission into Evidence

The NBI report, offered as Exhibits “A” and “B,” disclosed a complete match in all fifteen loci tested between the alleles of Umanito and BBB. The report calculated a Probability of Paternity of 99.9999 percent. Under the adopted procedure, a probability of paternity of 99.9 percent or higher gives rise to a disputable presumption of paternity under Section 6 of A.M. No. 06-11-5-SC. The defense did not object to the admission of the exhibits at the admissibility hearing and did not present countervailing evidence at the subsequent opportunity to rebut the presumption.

Trial Court Findings on Paternity and Chain of Custody

The RTC found that the qualifications and integrity of the NBI forensic chemists were properly established and that the sampling, handling, analysis, and chain of custody of the biological specimens were competent and adequate. The trial court concluded that the possibility of contamination, substitution, or manipulation of the samples was remote. Hence, on the basis of the NBI DNA analysis, the RTC ruled that Rufino Umanito is the biological father of BBB.

Effect on Criminal Case and Defendant’s Defense

The DNA finding materially undermined Umanito’s alibi defense and his assertion that he did not have sexual relations with AAA. The Supreme Court had earlier recognized that a conclusive determination that an accused did not sire the complainant’s child may cast reasonable doubt on a rape conviction; conversely, a conclusive determination of paternity supports the prosecution’s case. In this instance, the DNA evidence affirmed the inferences drawn by the lower courts and supported the factual matrix on which the conviction rested.

Motion to Withdraw Appeal and Supreme Court Disposition

After the remand proceedings and the RTC’s receipt and admission of the DNA evidence, Umanito filed a Motion to Withdraw Appeal dated 16 February 2009. The Supreme Court treated that motion as assent to the rulings of the RTC and the Court of Appeals. Finding no reason to disturb the convictions or the penalties imposed below, and observing that the remand and DNA proceedings produced results consonant with the lower courts’ conclusions, the Court granted the Motion to Withdraw Appeal. The Court ordered the case closed and terminated.

Legal Basis and Rules Applied

The Supreme Court directed the use of the newly promulgated DNA Rules (A.M. No. 06-11-5-SC) in the remand proceedings and required the RTC and the NBI to observe strict chain-of-custo

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