Buy-Bust Operations: Admissibility of Evidence and Validity of Warrantless Arrests in Drug Cases

In a 2001 decision, the Supreme Court laid down important rules on buy-bust operations in drug cases: the absence of marked money and prior surveillance does not invalidate an arrest, and evidence seized during a lawful warrantless arrest remains admissible in court. The ruling in People v. Beriarmente (G.R. No. 137612) provides practical guidance on how Philippine courts evaluate drug-related arrests and the evidence obtained from them.

The Case: A Buy-Bust in Badian, Cebu

In July 1997, police in Badian, Cebu received information that Francisco Beriarmente was looking for buyers of a sack of marijuana. A civilian relative of a police officer agreed to pose as a buyer. After meeting the accused at a restaurant, the poseur-buyer and Beriarmente rode a tricycle to fetch a sack from a house along Sawang Street. When the sack changed hands, the police, who had been following them, immediately arrested Beriarmente. The sack contained 1,500 grams of marijuana.

Beriarmente denied knowing the sack contained marijuana, claiming he was merely delivering it as a favor. The trial court convicted him of violating Section 4, Article II of Republic Act No. 6425 (the Dangerous Drugs Act), sentencing him to reclusion perpetua and a fine of P500,000. The Supreme Court affirmed the conviction.

The Issues Raised on Appeal

The accused raised three main arguments: (1) the buy-bust operation was flawed because no marked money was used or presented in court; (2) the police failed to present a surveillance report to prove the alleged one-month surveillance; and (3) his defense of good faith — that he did not know the contents of the sack — should have raised reasonable doubt.

The Ruling: What the Court Decided

On marked money. The Court ruled that the absence of marked money is not fatal to the prosecution's case. What matters is that the poseur-buyer received the illegal drugs from the accused and that the drugs themselves were presented as evidence in court. There is no legal rule requiring a simultaneous exchange of marked money and drugs, nor is there a rule requiring police to use only marked money. The non-presentation of marked money does not create a gap in the prosecution's evidence as long as the sale is adequately established and the substance is presented before the court.

On prior surveillance. The Court held that prior surveillance is not a prerequisite for a valid buy-bust operation. Citing People v. Ganguso (250 SCRA 268), the Court explained that when time is of the essence — such as when an informant gives positive news that a suspect is looking for a buyer — police may dispense with prior surveillance. The absence of a surveillance report has no bearing on the validity of the arrest.

On warrantless arrest. The arrest was valid under Rule 113, Section 5(a) of the Rules of Court, which allows a warrantless arrest when the person to be arrested has committed, is actually committing, or is attempting to commit an offense in the presence of the arresting officer. Because Beriarmente was caught in flagrante delicto during the buy-bust, his arrest was lawful, and the confiscated marijuana was admissible as the fruit of the crime.

On the defense of good faith. The Court rejected the argument that Beriarmente did not know the sack contained marijuana. The offense is mala prohibita (wrong because prohibited by law), so lack of criminal intent and good faith are not exempting circumstances. Mere possession or delivery of a prohibited drug, without legal authority, is punishable. The Court also noted that bare denials cannot prevail over the affirmative testimonies of the arresting officer and the poseur-buyer, who had no improper motives.

Practical Takeaways

• Marked money is not required. A buy-bust operation remains valid even without marked money, as long as the sale is proven and the drugs are presented in court.
• Prior surveillance is optional. Police may act immediately on information from an informant without conducting prior surveillance.
• Warrantless arrests in flagrante delicto are lawful. An arrest made during a buy-bust, where the accused is caught in the act, falls under Rule 113, Section 5(a) of the Rules of Court.
• Evidence seized from a lawful warrantless arrest is admissible. The confiscated drugs are admissible as fruits of the crime.
• Good faith is not a defense in drug cases. Since violations of the Dangerous Drugs Act are mala prohibita, lack of criminal intent does not exempt an accused from liability.

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