A troubling new detail from the Ohio “house of horr0rs” case is raising questions about what the parents at the center of the investigation may have actually known about the conditions inside the home.

As more information continues to emerge about what their children were allegedly experiencing, attention is now turning to the possibility that certain details may have remained hidden from the adults for longer than anyone realized.

Unnoticed — and whether the parents had any understanding of what was happening behind closed doors.

But there are still important unanswered questions about what the parents knew, when they knew it, and what investigators were able to establish through evidence and testimony.

As the case continues to unfold, one question remains particularly troubling:

What was the one detail the parents may never have known — and why was it allegedly kept hidden from them?

ABC News Australia — Details emerge about 16 children who lived in Ohio house of horrors