Investigators trying to figure out who killed a North Carolina woman and her three children in their Conover home are getting nationwide help.
Catawba County deputies say the television show "America's Most Wanted" would feature the killings Saturday.
Authorities say a man ambushed the family at their home Thursday, stabbing or shooting Lisa Saephan and her three children -- 20-year-old Melanie, 18-year-old Pauline and 3-year-old Cody -- to death.
Sheriff David Huffman says the suspect appeared to know the family's routine. Saephan's husband had left for work shortly before the killings.