A shocking new development is expanding the investigation into the Ohio “House of Horrors” case after authorities uncovered additional information that could shed light on how the family remained largely out of sight for years.

Investigators are now examining a much broader history surrounding the Siders family, including their movements between multiple Ohio counties and the apparent lack of routine medical, educational and government records for the children. According to Ohio authorities, the family had lived in several counties since 2008, raising new questions about how the situation remained undetected for so long.

But the investigation may be going even deeper. Prosecutors have indicated that additional serious felony charges are being pursued against members of the family. Newly reported allegations involving a young relative have added another disturbing dimension to the investigation and prompted authorities to examine evidence beyond the original child-endangerment charges.

When authorities executed a search warrant at the Hamden residence on June 30, they discovered 16 children ranging from 18 months to 18 years old inside the home. Officials said the children had been living in extremely poor conditions, with many confined to a single small room. Several children required medical evaluation, while some were hospitalized.

The latest evidence is raising an even bigger question: Was what investigators discovered in Hamden only one part of a much longer pattern?

Investigators are now being asked to reconstruct the family’s history across Ohio and determine whether warning signs existed at earlier residences or whether other people may have had information about the children’s circumstances.

The four adults initially arrested — Gary Siders Jr., Elizabeth Siders, Gary Siders Sr. and Christina Siders — were charged with multiple counts of child endangerment. Authorities have continued following the evidence, while prosecutors seek to determine whether additional charges are warranted.