Chain of Custody in Drug Cases: Integrity of Evidence and the Reasonable Doubt Standard

In drug cases, the prosecution's success depends not only on proving that the accused sold illegal drugs, but also on showing that the drugs presented in court are exactly the same items seized from the accused. This is the essence of the chain of custody rule under Section 21 of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002. In People v. Binasing (G.R. No. 221439, July 4, 2018), the Supreme Court acquitted an accused because the police failed to comply with these procedural safeguards and gave conflicting testimonies on material facts.

The Facts of the Case

On September 28, 2010, a buy-bust team in Opol, Misamis Oriental arrested Rashid Binasing for selling two plastic sachets of shabu to a civilian informant acting as poseur-buyer. The police recovered the buy-bust money and another sachet from his pocket. At the police station, SPO3 Allan Payla marked the seized items as ASP-1 and ASP-2, then delivered them to the PNP Crime Laboratory, where the forensic chemist confirmed they contained methamphetamine hydrochloride.

Binasing denied the charge. He claimed that six men barged into his house, identified themselves as police officers, found nothing after a search, and brought him to the station. He alleged that he was asked for P100,000.00, and when he could not pay, he was arrested and made to hold the buy-bust money.

The Regional Trial Court convicted him of illegal sale of drugs under Section 5, Article II of RA 9165, sentencing him to life imprisonment and a fine of P1,000,000.00. The Court of Appeals affirmed. On appeal, the Supreme Court reversed and acquitted him.

The Issue

The central issue was whether the prosecution had proven Binasing's guilt beyond reasonable doubt, given the apprehending team's failure to comply with Section 21, Article II of RA 9165 and the conflicting testimonies of its witnesses.

The Ruling: Non-Compliance with Section 21 Creates Reasonable Doubt

Section 21, as amended by RA 10640, requires the apprehending team, immediately after seizure and confiscation, to conduct a physical inventory and photograph the seized items in the presence of the accused or his representative or counsel, with an elected public official and a representative of the National Prosecution Service or the media as insulating witnesses.

The Court noted that the marking, physical inventory, and photographing of the seized items were not done in the presence of these insulating witnesses. No explanation was offered for this non-compliance. The prosecution also failed to establish that the accused was present during the marking and inventory. SPO3 Payla admitted he marked the items and prepared the Seizure Receipt only at the police station, not at the place of arrest.

The Court reiterated that non-compliance does not automatically invalidate the seizure, but the prosecution must prove two things: (1) there was a justifiable ground for non-compliance, and (2) the integrity and evidentiary value of the seized items were properly preserved. The prosecution cannot simply presume these grounds exist; it must explain them. Here, no such explanation was given.

Conflicting Testimonies on Material Facts

The prosecution's case was further weakened by irreconcilable inconsistencies among its witnesses. SPO3 Payla testified that the inventory was done at the police station, while SPO1 Sabaldana insisted it was made at the suspect's house. The witnesses also contradicted each other on the pre-arranged signal: one said the informant would raise his left hand, while another testified the signal was to wave both hands twice.

While minor inconsistencies do not impair a witness's credibility, the Court held that irreconcilable conflicts on material facts diminish, or even destroy, the veracity of their testimonies. These contradictions, combined with the chain of custody lapses, meant the prosecution failed to prove that the substances seized were the same items offered in court. The integrity of the corpus delicti was not established.

Practical Takeaways

• The chain of custody rule is mandatory. Police must mark, inventory, and photograph seized drugs immediately after seizure, in the presence of the accused and the required insulating witnesses (an elected public official and a representative of the NPS or media).
• Non-compliance is not automatically fatal, but it must be explained. The prosecution must present justifiable grounds for the lapse and prove that the integrity and evidentiary value of the seized items were preserved. Courts will not presume these grounds exist.
• Conflicting police testimonies on material facts can destroy a case. The prosecution must present a coherent narrative. Irreconcilable contradictions on where the inventory was made or what the pre-arranged signal was can raise reasonable doubt.
• For accused persons, procedural lapses matter. A conviction for drug offenses carries life imprisonment and heavy fines. If the police fail to follow Section 21, the defense may challenge the integrity of the evidence, which can lead to acquittal.
• For law enforcement, documentation is critical. The place and time of marking, inventory, and photographing, as well as the presence of witnesses, should be clearly and consistently documented to withstand judicial scrutiny.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.