Lane shot and killed three students and injured two others in February, 2012.
Judge Cynthia Westcott Rice was unmoved by oral arguments on behalf of Lane in March.
"Appellant did not act on impulse, on provocation, or under pressure from peers or adults," today's ruling read. "To the contrary, he planned this attack weeks in advance before he went to school that day with a loaded gun. He shot three young students to death. He shot another student several times, confining him to a wheelchair and subjecting him to a life of pain and disability. Appellant also brought indescribable pain, grief, and lifelong tragedy to the victims' families."
Barring escape or death, Lane will be in prison for life.
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