BOSTON (AP) — A Massachusetts teenager accused of killing a high school classmate whose headless body was found near a river has been indicted.

The Essex County District Attorney’s Office says a grand jury indicted 16-year-old Mathew Borges for first-degree murder Monday.

The body of 16-year-old Lee Manuel Viloria-Paulino was found near a river in Lawrence in December by a woman walking her dog. Police recovered his head nearby.

Both boys attended Lawrence High School. Borges said in a police report that they had gone to smoke marijuana together on Nov. 18, then parted ways.

But the report also said Borges told a witness that he had “stabbed a kid and cut his head off killing him.”

His lawyer couldn’t immediately be reached for comment.

Borges is expected to be arraigned March 31.

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