Avowed anti-Semite Frazier Glenn Miller Jr. killed William Corporon, 69, his grandson Reat Griffin Underwood, 14, and Terri LaManno, 53, in two separate attacks at Jewish community centers n 2014. Giving evidence at trial, where he represented himself, Miller said he was only sorry he hadn't killed more people. He gave a Nazi salute when he was convicted of capital murder, and screamed 'Heil Hitler' as the court sentenced him to death. Now, his lawyer, Reid Nelson, says attorneys should have been allowed to intervene when the court considered imposing the death penalty. His lawyer also says Miller was incapable of understanding legal arguments when representing himself at trial. Nelson admitted Miller presented the case he wanted to during the sentencing phase, but said his standby attorneys were better trained to present evidence to the jury about Miller's difficult life, mental health issues and other factors that might have prompted the shootings. Nelson also claims that the state's death penalty law is unconstitutionally vague. Now 80, Miller claimed at the time he didn't expect to live long because he suffered from chronic emphysema. Miller is an Army veteran who devoted much of his post-Army life to white nationalist activism. He founded the North Carolina chapter of the Ku Klux Klan and had run for the US Senate on a racist white-power platform.