Oct 5, 3:47 PM EDT

NYC mayor says child's death 'should not have happened'

NEW YORK (AP) -- New York City Mayor Bill de Blasio says the death of a 6-year-old boy whose family had been investigated for child abuse "should not have happened."

De Blasio said Wednesday that Zymere Perkins' death was "an unacceptable tragedy" and added that "the buck stops here."

Zymere died Sept. 26 after what prosecutors say was months of abuse by his mother and her boyfriend. Both have been arrested on charges of endangering the welfare of a child. Their attorneys did not immediately return calls seeking comment.

City officials have acknowledged that the mother, Geraldine Perkins, was investigated five times for abuse allegations.

The mayor and other officials spoke the day after Gladys Carrion, the commissioner of children's services, admitted in a tearful television interview that "we can't keep every child safe."

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