Title
Estate of Ong vs. Diaz
Case
G.R. No. 171713
Decision Date
Dec 17, 2007
A minor seeks compulsory recognition and support from her alleged father, Rogelio Ong, after abandonment. Despite his death, the Supreme Court orders DNA testing to resolve paternity, emphasizing its reliability and the rights of illegitimate children.

Case Summary (G.R. No. 171713)

Case Background and RTC Proceedings

In 1999, after Rogelio initially failed to respond to the complaint and was declared in default, the RTC granted Joanne’s petition, ordering Rogelio to recognize her as his daughter, provide monthly support, and pay attorney’s fees. Rogelio filed a motion for new trial which was granted, setting aside the default and the decision. Thereafter, the RTC ruled that Joanne was Rogelio’s illegitimate child, ordering support until she reached majority. Rogelio’s motion for reconsideration was denied. Rogelio later died in 2005, and his estate substituted him in the case.

Court of Appeals Decision and Appeal Issues

The Court of Appeals (CA), in its 2005 decision, reversed and set aside the RTC’s judgment, remanding the case for DNA testing to conclusively determine Rogelio’s paternity. The CA emphasized the reliability of modern DNA evidence and noted Rogelio had initially suggested DNA or blood testing. The CA denied the motion for reconsideration filed by the petitioner’s estate and justified remanding for DNA testing despite Rogelio’s death, considering advances in DNA technology and the possible availability of biological samples.

Issues Raised by the Petitioner

The petitioner raised three main issues:

  1. Whether the CA erred in not dismissing Joanne’s complaint despite purported failure to prove Rogelio’s paternity.
  2. Whether the CA erred in not declaring Joanne the legitimate child of Jinky and her husband Hasegawa, given the presumption of legitimacy.
  3. Whether it was proper for the CA to remand the case for DNA testing even though Rogelio was deceased, allegedly making such testing no longer feasible.

Supreme Court Focus on DNA Testing Issue

The Supreme Court opted to focus on the third issue regarding the remand for DNA testing, holding that a definitive DNA result would decisively resolve the filiation question and render moot the other issues. The Court acknowledged the presumption of legitimacy based on Jinky’s marriage but noted it can be overcome by proof of physical impossibility of paternity or scientific evidence like DNA testing.

Legal Presumptions on Legitimacy and Filiation

Under the 1987 Constitution and the Family Code, a child born to a married woman is presumed legitimate (Family Code, Article 164). Article 167 mandates reasonable presumptions favoring legitimacy, protecting the child’s status. The presumption is rebuttable by evidence such as physical impossibility of the husband’s access within specified periods (Family Code, Article 255). Legitimate filiation can be proved by official records, admissions, or continuous possession of status (Family Code, Articles 172, 175). Illegitimate children may establish filiation similarly.

DNA Testing: Scientific Validity and Judicial Acceptance

The Court detailed the scientific basis of DNA testing, explaining DNA as a unique genetic blueprint found in all cells, inherited half from each parent. It described modern DNA testing techniques such as Restriction Fragment Length Polymorphism (RFLP) and Polymerase Chain Reaction (PCR)-based Short Tandem Repeat (STR) analysis, emphasizing their high accuracy. DNA profiles facilitate direct comparison to determine paternity with extremely low error rates.

The Court traced jurisprudence recognizing DNA testing’s evidentiary value since 2001, with landmark cases admitting DNA results to ascertain identity, guilt, or filiation, culminating in Rules on DNA Evidence promulgated in 2007 (A.M. No. 06-11-5-SC). These rules define “DNA evidence,” “DNA profile,” “DNA testing,” and “Probability of Parentage,” and authorize courts to order DNA testing motu proprio or upon application by any legally interested person.

Remand for DNA Testing Despite Rogelio’s Death

The Court held that Rogelio’s death doe

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