FARMINGDALE - More details are emerging about what went on inside the Farmingdale home where an infant was found buried in a shallow grave in the backyard. Patty Ruane, who occasionally baby-sat for the family, tells News 12 Long Island that the infant's mother, Heather Kowalczik, was "afraid" that her boyfriend would kidnap one of her elder sons. As News 12 has reported, Kowalczik was living in the home with her two older children, ages 6 and 9, and their father, Robert Rodriguez. Child Protective Services was doing a routine check on the family last week when it inquired about an unseen infant, Justin, who would now be 3 years old. The boy's mother, Heather Kowalczik, allegedly told police where the child was buried. Robert Rodriguez allegedly kidnapped the couple's 9-year-old son after learning he was a person of interest in the infant's death. An AMBER Alert was issued, and the two were later found. Ruane says Kowalczik was always afraid that Rodriguez would kidnap their 9-year-old son. The baby-sitter says she believes the mother was too scared of him to come forward and tell police about what happened to their 17-month-old boy. State police say they are investigating the death as suspicious, but no charges have been filed at this time. Autopsy results on the infant's remains are still pending. Rodriguez has retained an attorney and News 12 Long Island has learned that he is not cooperating with the investigation.Police: Child's remains found in FarmingdaleAMBER Alert leads to arrest of suspect, child safe