Nationwide, there are at least 1,200 people serving life sentences without parole for crimes they committed when they were children. No central agency tracks these sentences, so reliable numbers are hard to come by. A 2008 Amnesty International/Human Rights Watch (HRW) report counted 2,484 such people. \
A 2009 Heritage Foundation report took issue with their methodology and put the number at a more conservative 1,291. In addition, thousands more teenagers have been sentenced to life with the possibility of parole (which most experts agree is, in practice, the same sentence, given how rarely lifers get parole), or to de facto life sentences of 60 years or more. The United States is the only country in the world where kids are sentenced to die in prison.