A couple who reported the abductions of two children in the past three years will be arrested shortly in the slaying of their 6-week-old daughter, the chief investigator in the case said Friday.

Detective Sgt. Rick McCain did not say when the arrest would be made.Friday afternoon, the couple's 15-month-old son, Randy, was removed from their home by the Illinois Department of Children and Family.

McCain said the parents had never been ruled out as suspects because of the similarities between the disappearance of their daughter, Heather, last week and that of their firstborn daughter, Loralei, in 1986.

A fisherman found Heather's body Wednesday night. It was wrapped in a black plastic bag and placed in a trash barrel.