A man who sold sex abuse material of children in the Philippines to a former Cambridge music teacher pleaded guilty in Boston federal court on Wednesday.

Christopher Allan Tisoy, 27, a Filipino national residing in Baltimore, Maryland, was charged by an information on Oct. 29 with one count of sexual exploitation of children and attempt and conspiracy, along with one count of conspiracy to commit sex trafficking of children.

Tisoy had been arrested in May alongside former Cambridge music teacher Joshua DeWitte , 50, of Cambridge. Both were indicted in October and remain in federal custody.

At the time DeWitte is suspected of the crimes, he was a music teacher at the Buckingham, Browne & Nichols K-12 School, according to the U.S. Attorney’s office and Middlesex District Attorney Mar

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