Title
People vs. Cajumocan
Case
G.R. No. 155023
Decision Date
May 28, 2004
Apolinario Mirabueno was fatally shot while asleep; appellant Cornelio Cajumocan convicted of Murder despite alibi and negative paraffin test, affirmed by Supreme Court.
murder
treachery
paraffin test

Case Summary (G.R. No. 155023)

Factual Background

On September 30, 1999, at about 11:30 p.m., Apolinario Mirabueno was asleep beside his brother, Leo, inside their house in Sitio Waray, Barangay Plaza Aldea, Tanay, Rizal. Leo was awakened by rustling noises outside the house. He then saw a solitary figure approach their house, pause outside the room, remove the fish net covering the window, and look inside. From the light of the fluorescent lamp inside the house, Leo recognized the man as appellant, Cornelio Cajumocan. Appellant drew a gun and shot Apolinario in the head, then fled. Leo and the victim’s sister, Margarita, brought Apolinario to a hospital in Morong, but he was declared dead on arrival.

Charging and Arraignment

Appellant was charged with Murder in an Information dated October 4, 1999. During arraignment, with counsel de parte, appellant pleaded not guilty. The prosecution presented the medico-legal findings and witness testimony to establish the identity of the shooter and the cause of death.

Medical Evidence and Cause of Death

Dr. Emmanuel Reyes, the Medico-Legal of the PNPC Crime Laboratory, examined the cadaver and found an open gunshot wound on the front part of the head. He described the measurements of the wound, including a point of entry located several centimeters above the left eyebrow and a point of exit at the right parietal region, with the exit at the back of the head. He concluded that the gunshot wound was fatal because it damaged both cerebral hemispheres of the brain. According to his report, death resulted instantaneously, and the cause of death was intracranial hemorrhage secondary to gunshot wound of the head.

Prosecution’s Evidence of Identity and Appellant’s Presence

The evidentiary core of the prosecution case was the identification made by the lone eyewitness, Leo Mirabueno, who testified that he recognized appellant from the interior light and confirmed that appellant shot the victim at the scene. His testimony provided the basis for appellant’s conviction despite the later defense evidence presented on physical tests.

Defense Evidence: Alibi and Paraffin Testing

For the defense, Ernesto Carpo, an inspector/investigator for AFSLAI Security Service where appellant worked, testified about appellant’s deployment and duties. Carpo claimed that appellant was assigned from 7 p.m. to 7 a.m. and that appellant remained in the area of his assignment, based on a photocopy of the Detail Order and the logbook showing appellant’s signature. Carpo further stated that the place where the shooting occurred was about one kilometer from where appellant was assigned.

Appellant testified that he arrived at his outpost before 7 p.m. on September 30, 1999, signed the logbook, stayed up to 8:30 p.m., returned to ensure the bodega was secure, watched television, sought permission to sleep, and then signed out at 7 a.m. He denied participating in the killing. During police investigation, he denied any involvement. He also testified that he underwent a paraffin test at Camp Crame on the following day, and that the results were negative for powder burns, which was presented as part of his attempt to show innocence.

Trial Court Ruling

On January 7, 2002, the RTC rendered a decision finding appellant guilty of Murder. It imposed the penalty of reclusion perpetua and ordered appellant to pay the heirs of the victim P50,000.00 as civil indemnity and P50,000.00 as actual damages, plus costs of the suit. The RTC found the elements of Murder to be proven beyond reasonable doubt, including treachery as a qualifying circumstance.

Issues on Appeal

Appellant assigned several errors centered on three principal questions: first, whether the negative findings of the paraffin test were conclusive evidence of innocence; second, whether treachery could be appreciated as a qualifying circumstance; and third, whether he was guilty beyond reasonable doubt of Murder under Article 248. He contended that the trial court should have discounted Leo’s testimony as biased because he was the victim’s brother. He further argued that the RTC erred in rejecting his denial and alibi.

Paraffin Test: Not Conclusive Proof of Innocence

The Supreme Court rejected appellant’s reliance on the negative paraffin test. It recognized that paraffin tests have been viewed as unreliable, explaining that the test can only establish the presence or absence of nitrates or nitrites and cannot definitively show that such nitrates or nitrites came from firing a firearm. It also cited jurisprudence holding that even a negative paraffin result does not necessarily mean the accused did not fire a gun, since a person may be negative if, for example, his hands had been washed before the test, or when the firearm used was of a caliber that could yield no detectable paraffin traces.

The Court emphasized that appellant was not convicted solely on the paraffin test. The conviction rested on positive, clear, and categorical identification by the lone eyewitness, Leo Mirabueno, whose testimony deserved full probative weight and credibility. The Court underscored that establishing the identity of the malefactor through eyewitness testimony is “the heart and cause” of the prosecution case. Accordingly, the negative paraffin test could not be treated as conclusive proof of innocence.

Treachery as a Qualifying Circumstance

The Court also sustained the trial court’s appreciation of treachery. It reiterated the doctrinal definition of treachery as the employment of means, methods, or forms of execution that tend directly and specially to ensure execution without risk to the offender arising from any defense the offended party might make. It identified the essence of treachery as a swift and unexpected attack on an unarmed victim without provocation.

Applying the controlling standards, the Court held that two conditions were present: first, the means of execution afforded the victim no opportunity to defend himself or retaliate; and second, appellant consciously adopted the means of attack. The Court found that appellant took advantage of the fact that the victim was asleep when he shot him. The victim’s inability to defend himself followed from the suddenness and severity of the attack. The nature of the gunshot wounds and Leo’s testimony were held sufficient to show both that the victim was unprepared and that appellant knowingly executed the attack at an unexpected time inside the victim’s dwelling while it was nighttime and the victim slept.

Credibility of the Lone Eyewitness Despite Relationship

Appellant further challenged Leo’s credibility, arguing that Leo was biased due to consanguinity as the victim’s brother. The Court rejected this contention. It held that relationship by consanguinity does not per se impair a witness’s credibility. It reasoned that, in certain cases, relationship may even strengthen credibility because it would be unnatural for an aggrieved relative to falsely accuse someone other than the actual perpetrator.

The Court relied on prior rulings that a relative’s earnest desire to seek justice for a dead kin is not served by abandoning conscience and prudence to blame the innocent. It also reiterated that no jurisdictional rule disqualifies a person from testifying in a criminal case merely because a relative is involved, so long as the witness was at the scene and observed the criminal act.

Denial and Alibi: Failure to Establish Physical Impossibility

The Supreme Court also found appellant’s denial and alibi insufficient. It held that appellant’s bare denial could not overcome the positive and categorical testimony of Leo. For alibi to prosper, the Court explained, the accused must show that he was somewhere else at the time of the crime and that it was physically impossible for him to be at the scene, considering the distance and the facility of access between the two places.

On the evidence, the Court found that the places were within walking distance. It noted that Sitio Bathala, where appellant claimed he was on duty, was approximately one kilometer from Sitio Waray, where the killing occurred. From this, the Court concluded that appellant could access the scene of the crime within minutes and, thus, appellant failed to demonstrate physical impossibility. The Court also stressed that trial courts’ factual findings and credibility assessments are binding on appeal absent overlooked or misappreciated facts of weight, which it found absent. Since the trial court had the advantage of observing the witnesses’ demeanor and conduct, its calibration of testimonial evidence received high respect.

Determination of Guilt Beyond Reasonable Doubt and Elements of Murder

The Court held that, given Leo’s identification and the corroborating circumstances, there was moral certainty of appellant’s guilt beyond reasonable doubt. It then applied the statutory definition of Murder under Article 248 as the unlawful killing not falling under parricide or infanticide,

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