A Kentucky man who killed three students and injured five more in a school shooting a quarter century ago has a chance at parole this week. Michael Carneal was a 14-year-old freshman in 1997 when he fired a stolen pistol at a before-school prayer group in the lobby of Heath High School, near Paducah, Kentucky. He received a life sentence with the opportunity for parole after 25 years, the maximum allowed at the time for someone his age. The hearing that began on Monday is his first opportunity for parole and could also be his last. The parole board has discretion to release him, to defer the decision, or order him to spend the rest of his life in prison without further hope of release.