An Oklahoma woman who was sentenced to 30 years in prison for failing to protect her children from abuse was freed on Friday. Tondalao Hall, 35, served 15 years behind bars while she and her children’s abuser served just two years in jail. Her case was the subject of a 2014 BuzzFeed News investigation that found 28 mothers in 11 states were sentenced to 10 years or more for failing to protect their children. In each of those cases, including Hall’s, there was evidence that the mother herself was also a victim of the abuse. Hall’s case was one of three where the mother got a longer sentence than the man who actually abused the child.