Child and Family Services began an investigation immediately, because in Idaho (and a number of other states), a single positive test result of THC in a newborn is considered presumptive evidence of child abuse. Although social workers found no evidence of drug use, Hamann's name was still placed on the agency's child protection central registry – a list of child abusers. But McGrath says having her name on the child abuse registry has had devastating consequences. The legal risk to their mothers depends on where they live – and it can go beyond a child abuse registry. But for the women like Hamann on the child abuse registry in Idaho, it's been much harder to move on.