T.J. Lane, 18, pleaded guilty last month to aggravated murder and other charges for a shooting in an Ohio High School in February 2012. He appeared in court while wearing a white t-shirt with the word "Killer" written on it on March 19.
Lane also flipped his middle finger to the courtroom, according to CBS. The teenager killed three teens and seriously injured three other at Chardon High School and he was sentenced to life in prison without parole.
Daniel Parmertor, 16, Demetrius Hewlin, 16, and Russell King Jr., 17, were killed in the shooting. Parmertor's mother told the judge during the trial that she wanted Lane to have the maximum sentence.
"I want him to suffer the rest of his life, the way I suffer the rest of my life without Danny," she said, according to CBS.
The judge, David. L. Fuhry, sentenced Lane to life in prison because of his lack of remorse and motive. Lane was 17 when he committed the crime, which is why he couldn't have received the death penalty.
Three others were seriously injured during the shooting. Lane opened fire when he was waiting for a bus and reportedly attended an alternative high school for students who didn't perform well in traditional schools.