NEW YORK (CBSNewYork/AP) — The head of New York City’s children’s services agency is vowing to investigate the mauling death of a 4-year-old boy in his Brooklyn home.

Administration for Children’s Services Commissioner John Mattingly tells the Daily News he is looking into whether, and to what extent, the agency had prior contact with the boy’s family. He says if it had, he wanted to make sure everything was done right.

Police say 4-year-old Jayelin Graham was mauled to death Friday night by a family dog, a male 100-pound Cane Corso mastiff.

Jayelin suffered wounds to his head, neck and torso and died at the hospital.

There were other animals found in the home, including a German shepherd. Both dogs were taken to Animal Care and Control.

The boy’s great-grandfather, Ameer Jamaal-Uddin, said the dogs belonged to the mother’s boyfriend.

Mattingly says he is also reviewing the agency’s procedures regarding dangerous dogs, and is considering tightening the rules.

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