A Detroit brother and sister vanished more than two years before they were found dead in a freezer in their home, and an 11-year-old Florida girl disappeared more than a year before she, too, turned up in a family freezer. And a 7-year-old Kansas boy hadn’t been seen for more than a month before authorities found the gruesome remains of a child in a pigsty inside his family’s barn.

All of them were home-schooled, but despite their disappearances going unnoticed for so long, opposition from the government-wary home-schooling community means it’s unlikely these states will start keeping closer tabs on home-schooled children.