MILAN, Mich. (AP) — Three inmates at a federal detention center in Michigan have been indicted in the fatal stabbing of a fellow inmate convicted of leading a child pornography ring.

A federal indictment unsealed Wednesday charges 39-year-old Alex Castro, 38-year-old Jason Kechego and 39-year-old Adam Wright with first-degree premeditated murder, conspiracy and assault with intent to murder in a January attack at the Milan detention center that killed 40-year-old Christian Maire of Binghamton, New York. Wright also was charged with assaulting and resisting a law enforcement officer.

Maire had been sentenced in December to 40 years in prison for exploiting children. He pleaded guilty to coercing girls to engage in sexual activity on a website.

The center is about 50 miles southwest of Detroit.

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