Police Discover Helmet of Alleged Acid Attack Perpetrator on KontraS Activist
Police are continuing their investigation into the acid attack on KontraS activist Andrie Yunus. Officers have recovered a helmet suspected to belong to the perpetrator.
Jakarta Central Metro Police Commander Brigadier General Reynold Hutagalung stated that his unit had recovered several pieces of evidence from the crime scene. Investigators first discovered the victim’s shirt and helmet.
“Subsequently, investigators coordinated with the Criminal Investigation Division of the National Police to follow up on evidence found at the crime scene, initially on 13 March 2026 sending samples of the victim’s shirt and helmet to the Criminal Investigation Division’s forensic laboratory,” said Reynold on Monday (16 March 2026).
The items were then examined to determine the chemical composition used by the perpetrator. Upon discovery, the victim’s shirt was in a melted condition.
“To determine what chemical compound was contained in the liquid that caused the victim’s burn injuries and the damage to or melting of the victim’s shirt,” he explained.
Another piece of evidence was an item belonging to the perpetrator. Investigators discovered a helmet suspected to belong to the perpetrator, which would undergo testing to identify the perpetrator.
“On 15 March 2026, evidence of the helmet suspected to belong to the perpetrator was sent to the Criminal Investigation Division’s forensic identification unit to obtain fingerprints and to the forensic laboratory to obtain DNA suspected to belong to the perpetrator,” he added.
Perpetrator Tracked the Victim
Earlier, Metro Jaya Regional Police revealed new findings in the investigation into the acid attack on KontraS Deputy Coordinator Andrie Yunus. Police stated there are four suspected perpetrators in the case, and the perpetrators tracked Andrie Yunus’s movements before carrying out the attack.
“Based on analysis of CCTV footage from various locations in Jakarta, the suspected perpetrators are believed to have tracked the victim’s movements before the incident, with the perpetrators’ movements detected through several surveillance camera points,” said Criminal Investigation Division Head of Metro Jaya Regional Police Brigadier General Iman Imanuddin at a press conference at the regional police headquarters.
The perpetrators’ movements were detected from the South Jakarta area through to the crime scene. Iman stated that the suspected perpetrators circled Medan Merdeka Raya Street, Ir H Juanda Street, the Tugu Tani area, and the YLBHI building, also located in Central Jakarta, where Andrie Yunus was present at the time. After Andrie finished attending a YLBHI event, the perpetrators resumed following him.