The slayings are "a stark reminder that we are in the midst of a war", Timothy Sini said, standing across the street from where the bodies of four young men were found Wednesday night.
The killings are consisted with that of the MS-13 gang, according to local police, and offer a "stark reminder" that the community continues to be at was with the gang.
Sini said the the department, in partnership with Suffolk County Crime Stoppers, is posting a $25,000 "fast cash reward" for any information that leads to the arrest of the perpetrator or perpetrators of the murders. "And make no mistake about it, it's a war".
Prior to police comment Thursday afternoon, friends of those missing said they believed MS-13 gang members, who are also accused in a slew of recent teen killings in the area, are responsible.
Prosecutors said Kayla Cuevas, 16, was targeted last summer by a group of four gang members, including two juveniles, because she had been feuding with MS-13 members at school and on social media. Commissioner Sini had not yet shared with the public why and how his officers were alerted to the horrific crime scene.
Family members of Tigre and Llivicura said that police had confirmed that their sons were dead.
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It is not clear when or how the bodies were dumped in a wooded area.
Sini made his declaration after the corpses of four young men turned up in a Central Islip park - with a video of the bodies sent to the girlfriend of one teen. "We have all hands on deck, and we're working closely with the Federal Bureau of Investigation", he said. He said the bodies had "significant trauma" wounds, and he believes all the victims were killed there.
"MS-13 has gone out of their way to try to recruit these youngsters with varied success". His cousin, who didn't want to be identified, said Llidicura told him Wednesday he was going to the park.
His brother told the Post he recently found messages on Tigre's computer reading, "I don't want to do these things anymore".
Emergency vehicles are parked near the site where four bodies were discovered in Central Islip, N.Y., Thursday, April 13, 2017. Eric Holder, Loretta Lynch, I don't know what these people were thinking. Mickens tried to fight off the kidnappers and both of the teenage girls were killed.
The discovery comes several weeks after eight MS-13 gang members were arrested in connection with the beating deaths of two teenage girls. It grew after some members were deported to El Salvador, helping turn that country into one of the most violent places in the world.