DAVAO: On May 14, five days after voters in the Philippines chose Davao City Mayor Rodrigo Duterte as their next president, two masked gunmen cruised this southern city’s suburbs on a motorbike, looking for their kill. Gil Gabrillo, 47, a drug user, was returning from a cockfight when the gunmen approached. One of them pumped four bullets into Gabrillo’s head and body, killing the small-time trader of goods instantly. Then the motorbike roared off. The murder made no headlines in Davao, where Duterte’s loud approval for hundreds of execution-style killings of drug users and criminals over nearly two decades helped propel him to the highest office of a crime-weary land. Human rights groups have documented at least 1,400 killings in Davao that they allege had been carried out by death squads since 1998. Most of those murdered were drug users, petty criminals and street children. In a 2009 report, Human Rights Watch identified a consistent failure by police to seriously investigate targeted killings. It said acting and retired police officers worked as “handlers” for death-squad gunmen, giving them names and photos of targets – an allegation denied by Davao police. But a four-year probe into such killings by the National Bureau of Investigation, the Philippines’ equivalent of the FBI, hasn’t led to a single prosecution, and one senior NBI agent told Reuters it will probably be shelved now that Duterte is set to become president. The nation’s Justice Secretary last week told reporters the probe may not be able to proceed. Such impunity, and Duterte’s demands in recent weeks for more summary justice, could embolden death squads across the country, say human rights and church groups. Already there has been a spate of unsolved killings in nearby cities, with other mayors echoing Duterte’s support for vigilante justice. “We’ve seen it happen in Davao and we’ve seen copycat practices,” Chito Gascon, chairman of the Commission on Human Rights (CHR), an independent Philippine watchdog, told Reuters. “Now can you imagine he is president and the national model for crime-fighting is Davao?” Ask Clarita Alia, 62, who still lives in the Davao slum where her four sons were murdered, and she gives a mirthless chuckle. “Blood will flow like a river,” she says. Duterte, who has been Davao’s mayor or vice-mayor for most of the past 30 years, has denied any involvement in the murders. “I never did that,” he said on the campaign trail in April, responding to allegations he had directed the killings. An Office of the Ombudsman investigation also found there was no evidence connecting Duterte to the murders. He has, though, repeatedly condoned them. For example, in comments to reporters in 2009, he warned: “If you are doing an illegal activity in my city, if you are a criminal or part of a syndicate that preys on the innocent people of the city, for as long as I am the mayor, you are a legitimate target of assassination.”