WHEN WELFARE authorities remove a child from the home, it is supposed to be for the child’s safety. It is simply unthinkable that a 2-year-old girl in Prince George’s County who was taken from her mother’s custody was beaten to death while in the care of a foster family. Not only must there be a thorough review by county and state authorities, but it’s important that circumstances of the case — including a determination of whether the tragedy could have been prevented — be made public.

Aniyah Batchelor, who turned 2 in March, died Tuesday of “blunt force trauma,” according to Prince George’s police, who said she was beaten inside her foster parents’ home in Fort Washington. A 12-year-old boy, son of the unnamed foster parents, was charged with second-degree murder. Police allege that the boy had “beaten the child repeatedly’’ in a single attack; no weapon was used. It appears that the parents were away and their 15-year-old daughter was babysitting.

The toddler had been in foster care since November. “Our hearts go out to the families involved. Both families and the staff that worked with them will need our support in the coming days,” read a statement issued by the Maryland Department of Human Resources, parent agency for the Prince George’s County Social Services Department, which handled the child’s placement. There is no doubting the need for sympathy, but officials also must provide a better explanation of the actions taken in this case.

Predictably, they have chosen to hide behind a supposed need for confidentiality and privacy even as state spokesman Pat Hines acknowledged that the state can discuss some details about a child in foster care if there is “an allegation of abuse and neglect” resulting in a death. Incredibly, state legal authorities concluded that that exemption doesn’t apply to Aniyah’s case.