In July, 1977, defendant Department of Social Services of the County of Nassau (hereinafter DSS) placed a four-year-old child and his sister in the foster home of defendant Margaret Toomer after the infant’s natural mother was sentenced to prison. Subsequent to placement, the DSS received several reports that the infant was being “beaten” and otherwise “abused” by the foster mother. DSS employees allegedly investigated the complaints and determined that the child should remain in guardian’s care pending completion of their investigation.
On or about November 17, 1978, the decedent’s grandfather and administrator of his estate, commenced the present action against the County of Nassau, the DSS and the guardian. The cause of action against the county defendants asserted, in effect, that they were negligent in placing the infant in guardian’s care, investigating the complaints of abuse against her, and failing to remove the infant from her care. Initially, the county defendants denied these allegations, and then, on April 30, 1984, some five years after the service of the answer, moved for leave to amend their answer to interpose the affirmative defense of immunity and for summary judgment dismissing the complaint insofar as it was asserted against them.