The Philippines has seen some of its largest protests yet against President Rodrigo Duterte in recent weeks, as public scrutiny grows over recent deaths in the countrys violent anti-drug campaign.

Much of the outrage has stemmed from three highly publicized killings where police are alleged to have targeted young Filipinos and covered up their brutal murders. Evidence has emerged in each case that contradicts police accounts of the deaths, highlighting what rights groups have long alleged are widespread abuses in Dutertes drug war.

Earlier this month, a body believed to be that of 14-year-old Reynaldo de Guzman was found in the Philippines Gapan City. The teens body had been stabbed around 30 times and his head was wrapped in packing tape.

Guzmans parents identified their son in the morgue on Sept. 6, after he had been missing for 20 days. He was last seen near his home on the outskirts of the capital of Manila with 19-year-old Carl Arnaiz, a friend who was also found dead 10 days earlier in a separate town over 50 miles away from where Guzmans body was recovered.

Police claimed Arnaiz died in a shootout after attempting to rob a cab driver, but forensic reports showed that he had been shot while on his knees and potentially tortured. Police also stated that the young boys body found in Gapan City did not match Guzmans DNA, but both Guzmans parents and the Public Attorneys Office disputed the police findings and questioned their credibility.

Public suspicion of police accounts in the drug war is common in the Philippines, and a poll released on Wednesday showed that about half of the country believes that many of those killed are neither drug dealers nor resisted arrest.

Although the exact series of events that led to the deaths of Guzman and Arnaiz is currently unknown, the incident fueled outrage from activists and rights groups who saw echoes of a third extrajudicial killing of a teenager last month.