PEOPLE OF THE PHILIPPINES, Plaintiff-Appellee, v. JOSELITO BARTOLOME y GARCIA, Accused-Appellant. G.R. No. 191726, February 6, 2012.

DOCTRINE: In prosecutions for the illegal sale of dangerous drugs, the identity of the prohibited drug must be established with moral certainty. The chain of custody rule, particularly under Section 21 of Republic Act No. 9165, requires the prosecution to account for each link in the chain from seizure to presentation in court. A deviation from the prescribed procedure must be justified, and failure to do so, coupled with irregularities that cast doubt on the integrity of the evidence, warrants acquittal.

FACTS

1. Based on a tip from a confidential informant, a buy-bust operation was planned against accused-appellant Joselito Bartolome for selling shabu.
2. On June 15, 2004, PO2 Rodelio Santos acted as the poseur-buyer. He was given marked money. The transaction took place in front of Bartolome’s house, where Santos handed the money in exchange for a plastic sachet containing white crystalline substance.
3. After the sale, Santos gave the pre-arranged signal. The backup team arrested Bartolome. The marked money was not recovered.
4. The seized sachet was marked by PO2 Santos at the police station, not at the place of arrest. The request for laboratory examination, the seized item, and its turnover to the forensic chemist were handled by different officers. The forensic chemist testified on the qualitative examination but was not presented to testify on the quantitative analysis report.
5. The Regional Trial Court convicted Bartolome for illegal sale of shabu. The Court of Appeals affirmed the conviction.
6. Before the Supreme Court, Bartolome argued that the prosecution failed to establish an unbroken chain of custody of the seized drug, highlighting the failure to mark the item immediately at the scene and the lack of testimony on the quantitative analysis.

ISSUE

Did the prosecution successfully establish an unbroken chain of custody of the seized dangerous drug, thereby proving the corpus delicti of the crime of illegal sale beyond reasonable doubt?

RULING

NO. The Supreme Court REVERSED the decision of the Court of Appeals and ACQUITTED accused-appellant Joselito Bartolome.

The Court held that the prosecution failed to prove an unbroken chain of custody, creating reasonable doubt as to the identity and integrity of the *corpus delicti*. The following critical lapses were noted:
1. Failure to Mark Immediately at the Scene: PO2 Santos admitted that he marked the seized sachet only upon arrival at the police station, not at the place of arrest. Section 21 of RA 9165 requires immediate marking after seizure to prevent switching, planting, or contamination.
2. Gaps in the Custody Chain: The evidence showed that the officer who had custody of the item after the buy-bust (PO2 Santos) was not the same officer who delivered it to the crime laboratory (PO3 Bautista). The prosecution did not explain how PO3 Bautista came into possession of the item, creating a missing link.
3. Non-Presentation of the Quantitative Analyst: While the forensic chemist who conducted the qualitative test was presented, the prosecution did not present the forensic chemist who prepared the *Quantitative Examination Report*. This report was crucial as it pertained to the actual weight of the seized drug, an essential element of the crime. The defense was deprived of the right to cross-examine the analyst on this report.
4. Lack of Justification for Procedural Lapses: The prosecution offered no justifiable reason for these deviations from the strict procedure mandated by law. In the absence of such justification, and considering that the integrity and evidentiary value of the seized item were compromised, the accused must be acquitted.

The Court emphasized that in drug cases, the substance itself is the very *corpus delicti*. Every link in the chain of custody must be accounted for to remove any doubt of substitution, tampering, or contamination. The presumption of regularity in the performance of official duty cannot prevail over the constitutional presumption of innocence when the procedures designed to ensure evidence integrity have been breached.