A Missouri prosecutor says the U.S. Supreme Court decision to forbid executing murderers under the age of 18 could end up putting those same killers back on the street one day. St. Louis County Attorney Bob McCulloch says the international law cited by the Supreme Court majority that says minors are not as culpable for their actions also says they cannot be sentenced to life without parole. McCulloch says that means Missouri killer Christopher Simmons and others who have killed as minors might even be paroled one day.