Does this Court's 8th Amendment protections extend to a just turned eighteen year old who received life without parole, where the evidence shows he was not a mature adult in brain development?

QUESTION(S) PRESENTED 1. Does this Court's 8th Amendment protections extend : to a just turned eighteen year old who received life . without parole, where the evidence shows he was not a / mature adult in brain development. . 2. Whether this court's decision in Atkins v Virginia should extend to a natural life without parole , : sentence for an individual with underdeveloped brain : functioning. 7 ; a . eo a . : / ,