Louisville, KY – More than a decade after killing three classmates, the Heath High School shooter has been granted a hearing. A judge will determine if a mental illness prevented Michael Carneal from appealing his guilty plea. U.S. District Judge Thomas Russell says there's enough evidence in Carneal's case to question whether he was incompetent after the plea and unable to appeal. The 26-year-old Carneal is serving a sentence of life without the chance of parole for at least 25 years for the shootings, which occurred when he was 14. Carneal pled guilty to the killing in 1997 of three classmates and the wounding of five others. Russell did not set a date for the hearing.