People vs. Lagao, Jr.

The right to preliminary investigation is waivable, and an accused who fails to invoke it before the trial court, enters a plea, and actively participates in the trial is estopped from questioning its irregularity for the first time on appeal. Furthermore, circumstantial evidence is sufficient for conviction if there is more than one circumstance, the facts from which inferences are derived are proven, and the combination of all circumstances produces a conviction beyond reasonable doubt, forming an unbroken chain that points to the accused to the exclusion of all others.

Fidel Lagao, Jr. and Gloria Castro Lagao were married in 1983, but their marriage became stormy due to the husband's obsessive jealousy, physical abuse, and death threats, causing the wife to repeatedly leave him. On October 30, 1989, after a prolonged separation, Gloria was seen boarding her husband's passenger jeepney. The following day, her body was found near an irrigation ditch in Sto. Tomas, Lubao, Pampanga, bearing multiple stab wounds and a slashed throat. The accused was subsequently arrested and charged with parricide.

• Marriage and Estrangement: Fidel Lagao, Jr. and Gloria Castro Lagao were married on May 1, 1983. Their marriage became marked by violent quarrels driven by the accused's obsessive jealousy, frequently ending with the accused beating his wife, threatening to kill her, and the wife seeking refuge with her parents. In October 1989, following a severe beating, Gloria left the accused and stayed with her parents, reporting the threats to the police and barangay officials. This separation was unusually extended, with Gloria showing no intention of returning.
• The Last Sighting: On October 30, 1989, at around 5:00 PM, Gloria informed her mother that her husband had asked her to go with him. Despite her mother's dissuasion, Gloria waited in the street and boarded the passenger jeepney driven by the accused, as witnessed by her sister Purita and her brother Jesus. Around 6:00 to 6:30 PM, witness Eduarda Agapito saw Gloria seated inside the accused's jeepney.
• Discovery of the Body: Gloria did not return home that night. The following morning, her body was found near an irrigation ditch in Sto. Tomas, Lubao. She was half-naked, with her throat slashed and multiple stab wounds on her body. Dr. Paz Lalic-Yap conducted the autopsy and determined the cause of death as cardio-respiratory failure secondary to the slashed throat and multiple stab wounds.
• Investigation and Arrest: The police identified the accused as the prime suspect. Upon his arrest and subsequent interrogation, investigators noticed scratches on his hand, arm, and shoulder. The accused voluntarily removed his shirt, revealing a scratch on his right shoulder, which was photographed. He was subsequently examined by Dr. Lilia Carlos at the Pampanga Provincial Hospital, who documented four linear abrasions on his right arm, a 1.5 cm abrasion on his left wrist, and linear abrasions on his back. The abrasions were already starting to heal.
• Defense of Denial: The accused denied the stormy nature of his marriage and claimed their relationship was harmonious. He denied fetching his wife on October 30, 1989, and claimed he did not drive his jeepney that day. He offered conflicting explanations for his physical injuries: he told Dr. Carlos that he sustained the back abrasions while fixing something under his jeep, but during trial, he claimed the abrasions were caused by police officers who pushed him around and poked guns and knives at him to force a confession.

• Petitioner argued that the MTC conducted the preliminary investigation ex parte and without notice, violating his right to due process.
• Petitioner contended that the warrant of arrest was defective because no bail was fixed and the order did not state that the evidence of guilt was strong.
• Petitioner maintained that he was illegally arrested.
• Petitioner claimed that the prosecution's testimonies were hearsay and inadmissible.
• Petitioner asserted that the police inflicted his physical injuries to force a confession, which belied the prosecution's theory that the victim struggled, noting that the autopsy report indicated no abrasions on the victim and clean fingernails.

• Respondent countered that the alleged errors regarding bail, preliminary investigation, and illegal arrest were without merit, as the accused waived these rights by submitting to the trial court's jurisdiction, entering a plea, and actively participating in the trial.
• Respondent argued that the testimonies of Jesus and Purita Castro were admitted to prove the tenor of their statements, not the truth of the matter asserted.
• Respondent maintained that the conviction was properly based on sufficient circumstantial evidence establishing an unbroken chain pointing to the accused's guilt.

• Procedural Issues: Whether the accused waived the right to question the irregularities in the preliminary investigation and his alleged illegal arrest by entering a plea of not guilty and actively participating in the trial.
• Substantive Issues: Whether the circumstantial evidence presented by the prosecution constitutes an unbroken chain sufficient to prove the accused's guilt beyond reasonable doubt for the crime of parricide.

• Procedural: The Court held that the accused waived any irregularities in the preliminary investigation and arrest. The right to preliminary investigation is not fundamental and may be waived expressly or by silence. Because the accused failed to question the irregularities before the provincial prosecutor or the RTC, entered a plea of not guilty, and actively participated in the trial, he is estopped from asserting these forfeited rights for the first time on appeal. Furthermore, the MTC acted properly under Section 6(b), Rule 112 of the Rules of Court in issuing the warrant of arrest without fixing bail, as it was not required to state that the evidence of guilt was strong; the accused should have filed a petition for bail if he sought temporary liberty.
• Substantive: The Court ruled that the circumstantial evidence was sufficient for conviction. Pursuant to Section 4, Rule 133 of the Rules of Court, circumstantial evidence suffices if there is more than one circumstance, the facts are proven, and the combination produces moral certainty. The following proven circumstances constituted an unbroken chain pointing to the accused to the exclusion of all others: (1) the marriage was estranged and on the verge of breaking up; (2) their relationship was marked by violent quarrels and death threats; (3) the wife's last separation was unusually extended; (4) the victim was last seen alive with the accused in his jeepney; and (5) the accused sustained unexplained physical injuries consistent with a struggle. The accused's defense of denial and conflicting explanations for his injuries could not prevail over the overwhelming circumstantial evidence.

• Waiver of the Right to Preliminary Investigation — The right to a preliminary investigation is not a fundamental right and may be waived expressly or by silence. Failure of an accused to invoke the right before the trial court, coupled with entering a plea and actively participating in the trial, constitutes a waiver of the right and any irregularity attending it. The right may be forfeited by inaction and cannot be invoked for the first time on appeal. The Court applied this doctrine to hold that the accused was estopped from questioning the ex parte preliminary investigation and the issuance of the warrant of arrest.
• Circumstantial Evidence for Conviction — Circumstantial evidence is sufficient for conviction if: (a) there is more than one circumstance; (b) the facts from which the inferences are derived are proven; and (c) the combination of all the circumstances is such as to produce a conviction beyond reasonable doubt. The circumstances proven must be consistent with the hypothesis that the accused is guilty and, at the same time, inconsistent with any other hypothesis except that of guilt, forming an unbroken chain leading to one fair and reasonable conclusion pointing to the accused. The Court applied this principle to affirm the parricide conviction despite the lack of an eyewitness, as the chain of circumstantial evidence firmly established the accused's guilt.

• "The right to preliminary investigation is not a fundamental right and may be waived expressly or by silence. Failure of an accused to invoke his right to a preliminary investigation constitutes a waiver of such right and any irregularity that attends it. The right may be forfeited by inaction and can no longer be invoked for the first time at the appellate level."
• "As jurisprudentially formulated, a judgment of conviction based on circumstantial evidence can be upheld only if the circumstances proven constitute an unbroken chain which leads to one fair and reasonable conclusion pointing to the accused, to the exclusion of all others, as the guilty person, i.e., the circumstances proven must be consistent with the hypothesis that the accused is guilty, and at the same time inconsistent with any other hypothesis except that of guilty."

• People v. Rabang, 187 SCRA 682 (1990) — Followed. Cited as authority for the proposition that an accused waives the right to question an illegal arrest and irregular preliminary investigation by submitting to the trial court's jurisdiction and actively participating in the trial.
• People v. Hubilo, 220 SCRA 389 (1993) — Followed. Cited to support the doctrine that the right to preliminary investigation is waivable and forfeited by inaction.
• People v. Tiozon, 198 SCRA 368 (1991) — Followed. Cited for the rule that circumstantial evidence must constitute an unbroken chain leading to a fair and reasonable conclusion pointing to the accused to the exclusion of all others.

• Section 4, Rule 133, Rules of Court — Enumerates the conditions under which circumstantial evidence is sufficient for conviction. The Court applied this provision to uphold the conviction, finding that the prosecution successfully established more than one circumstance, the facts were proven, and the combination produced moral certainty of the accused's guilt.
• Paragraph (b), Section 6, Rule 112, Rules of Court — Authorizes the Municipal Trial Court to issue a warrant of arrest if the judge is satisfied that probable cause exists and immediate custody is necessary. The Court applied this provision to validate the MTC's issuance of the warrant of arrest without fixing bail.
• Section 1, Rule 112, Rules of Court — Defines the purpose of a preliminary investigation as determining whether there is sufficient ground to engender a well-founded belief that a crime has been committed and the respondent is probably guilty. The Court applied this provision to reject the accused's claim that the MTC required proof beyond reasonable doubt during the preliminary investigation.

Narvasa, C.J., Melo, Francisco, and Panganiban, JJ.