Prosecutors say a 15-year-old boy was kidnapped and attacked by alleged MS-13 gang members.
They say it happened in January when the teenager was lured to the Huntington train station where he was robbed and attacked.
The victim was then thrown into a car and taken to Pilgrim Psychiatric Center, according to court papers.
The Suffolk County district attorney says the group then continued to assault the teen and fractured his skull.
Seven alleged members of the gang were indicted on Friday.
One of the alleged attackers, Josue Zepeda Padilla, is still on the loose.