CHARDON, Ohio — A teenager charged with killing three students at an Ohio high school pleaded guilty to all charges Tuesday, the eve of the first anniversary of the shooting rampage.

T.J. Lane, now 18, pleaded guilty to three counts of aggravated murder, two counts of attempted aggravated murder and a single count of felonious assault.

The Wednesday anniversary of the attacks at Chardon High School comes after a year of mass shootings, including one that left dead 20 first-graders and six educators in Newtown, Conn., and another that claimed 12 lives at an Aurora, Colo., movie theater.

The anniversary in Chardon, a tight-knit courthouse community east of Cleveland, will be marked with a memorial walk and service activities at the school.

Lane, dressed in a green open-collar shirt and dark slacks with his once-shaggy hair buzzed short, held his head up without emotion Tuesday as he repeatedly said, "Yes, your honor," to questions posed to him by the judge.

He could face life in prison. Judge David Fuhry scheduled sentencing for March 19.

Lane wasn't subject to the death penalty because he was 17 at the time of the crimes.

Geauga County Prosecutor James Flaiz said the plea provided the same outcome that he wanted from a trial. Families of the victims agreed that Lane should face life in prison, he said.

Flaiz said he was prepared to present a motive at trial but declined to specify it.

Two wounded survivors and parents of most of the victims watched Lane's plea.

Bob Parmertor, father of Danny Parmertor, 16, who was killed, said after the plea that he felt justice would be done if Lane "will never see daylight again" outside prison. "We're just very glad it's not going to trial," he said.

Lane's grandmother, weeping quietly, sat arm's length from Nick Walczak, who was rolled into court in a wheelchair. Walczak, who was crippled in the attack, shifted his eyes to Lane as the attempted aggravated murder charge detailing his case was read by the judge.

Lane was determined to take responsibility, his attorney said after the court session.

"T.J.'s plea of guilty is a complete admission to each and every element of each and every charge, every crime," defense attorney Ian Friedman said.

"It is hoped that the decision will bring closure to what has been a tragic year for the victims, their families and loved ones, T.J.'s family and the entire community both near and far."

Prosecutors say Lane fired 10 shots at students in a cafeteria at Chardon High School, east of Cleveland. He was there waiting for a bus to another school.

Lane, who was 17 at the time of the shooting, was prosecuted as an adult. Minutes before his guilty plea, the judge accepted a report finding Lane mentally competent to stand trial.

Both the defense and the prosecution had sought court-ordered psychiatric testing for Lane to determine if he would be competent to stand trial.

Before the case went to adult court last year, a juvenile court judge ruled that Lane was mentally competent despite evidence he suffers from hallucinations, psychosis and fantasies. He withdrew his plea of not guilty by reason of insanity on Tuesday.

Investigators say he admitted shooting at students but said he didn't know why he did it. Prosecutors say Lane took a .22-caliber pistol and a knife to the school on Feb. 27, 2012, and fired 10 shots at a group of students in the cafeteria.

Lane attended an alternative school for students who haven't done well in traditional schools. He was at Chardon waiting for a bus.

Earlier on HuffPost:



Loading Slideshow...
  • TJ Lane

    T.J. Lane smirks as he listens to the judge during sentencing Tuesday, March 19, 2013, in Chardon, Ohio. Lane, was given three lifetime prison sentences without the possibility of parole Tuesday for opening fire last year in a high school cafeteria in a rampage that left three students dead and three others wounded. Lane, 18, had pleaded guilty last month to shooting at students in February 2012 at Chardon High School, east of Cleveland. Investigators have said he admitted to the shooting but said he didn't know why he did it. Before the case went to adult court last year, a juvenile court judge ruled that Lane was mentally competent to stand trial despite evidence he suffers from hallucinations, psychosis and fantasies. (AP Photo/The News-Herald, Duncan Scott, Pool)

  • T.J. Lane

    T.J. Lane sits in court during sentencing Tuesday, March 19, 2013, in Chardon, Ohio. Lane, was given three lifetime prison sentences without the possibility of parole Tuesday for opening fire last year in a high school cafeteria in a rampage that left three students dead and three others wounded. Lane, 18, had pleaded guilty last month to shooting at students in February 2012 at Chardon High School, east of Cleveland. Investigators have said he admitted to the shooting but said he didn't know why he did it. Before the case went to adult court last year, a juvenile court judge ruled that Lane was mentally competent to stand trial despite evidence he suffers from hallucinations, psychosis and fantasies. (AP Photo/The News-Herald, Duncan Scott, Pool)

  • TJ Lane

    T.J. Lane unbuttons his shirt during sentencing Tuesday, March 19, 2013, in Chardon, Ohio. Lane, was given three lifetime prison sentences without the possibility of parole Tuesday for opening fire last year in a high school cafeteria in a rampage that left three students dead and three others wounded. Lane, 18, had pleaded guilty last month to shooting at students in February 2012 at Chardon High School, east of Cleveland. Investigators have said he admitted to the shooting but said he didn't know why he did it. Before the case went to adult court last year, a juvenile court judge ruled that Lane was mentally competent to stand trial despite evidence he suffers from hallucinations, psychosis and fantasies. (AP Photo/The News-Herald, Duncan Scott, Pool)

  • Chardon High School Shooting

    Students leave with parents from Maple Elementary School after a shooting at Chardon High School Monday. Students assembled at Maple Elementary School after a shooting took place at the high school. A gunman opened fire inside the high school's cafeteria at the start of the school day, killing three students and wounding two others, officials said. A suspect is in custody. (AP Photo/Tony Dejak)

  • Ohio Shooting

    Community members attend a during a prayer service for victims of a school shooting at Chardon Assembly of God in Chardon, Ohio on Feb. 27, 2012. A gunman opened fire inside the Chardon High School's cafeteria at the start of the school day Monday, killing three students and wounding two others.

  • Demetrius Hewlin

    Demetrius Hewlin, a junior, was one of three students taken by helicopter to a local hospital following the shooting. He died. <em>Photo provided via <a href="https://www.facebook.com/pages/RIP-Demetrius-Hewlin/115955785195928?sk=wall" target="_hplink">Facebook</a> tribute. </em>

  • Danny Parmertor

    Danny Parmertor, 16, a junior, was shot along with several classmates while waiting for a bus. Parmertor was airlifted to a hospital and died shortly after. <em>Photo provided via <a href="https://www.facebook.com/pages/RIP-Danny-Parmertor/121146101345306" target="_hplink">Facebook</a> tribute.</em>

  • Russell King

    Russell King Jr., 17, was pronounced brain dead shortly after the shooting and died the next day. <em>Photo provide via <a href="https://www.facebook.com/pages/RIP-Russell-King/385026981508707" target="_hplink">Facebook</a> tribute. </em>

  • Ohio High School Shooting

    A FBI agent speaks with people in front of Chardon High School where a shooting took place on Feb. 27, 2012. A gunman, believed to be a student, opened fire inside the high school cafeteria, immediately killing three students and wounding two others.

  • Ohio Shooting

    Flags fly at half staff in front of the town hall in Chardon, Ohio for the victims of an early morning school shooting on Feb. 27, 2012. A gunman opened fire inside the high school's cafeteria at the start of the school day, killing three students and wounding two others.

  • TJ Lane

    This February 27, 2012 photograph shows a picture of Chardon High School shooter T.J. Lane posing on his Facebook page. Lane, opened fire with a handgun on a group of fellow students at Chardon High shortly after the start of the school day on Monday, killing three and wounding two others.

  • Ohio Shooting

    An Ohio Highway Patrol helicopter takes off from the rear of Chardon High School in Chardon, Ohio on Feb. 27, 2012. A gunman opened fire inside the high school's cafeteria at the start of the school day Monday, killing three students and wounding two others, officials said.

  • Ohio School Shooting: Prayer Service

    Alissa Sully, 17, hugs a friend before a prayer service for victims of a school shooting at Chardon Assembly of God in Chardon, Ohio Monday, Feb. 27, 2012. A gunman opened fire inside the high school's cafeteria at the start of the school day Monday, killing three students and wounding two others. (AP Photo/Mark Duncan)

  • Ohio School Shooting

    A woman and her children walk down a back street near Chardon High School in Chardon, Ohio Monday, Feb. 27, 2012. A gunman opened fire inside the high school's cafeteria at the start of the school day Monday, killing three students and wounding two others, officials said. Special Agent Vicki Anderson said Monday the shooter was taken into custody near his car about half a mile (one kilometer) away from the high school. (AP Photo/Mark Duncan)

  • Four Students Injured, Two Killed In Ohio High School Shooting

    A sign in front of Chardon High School where a shooting took place on Feb. 27, 2012. A gunman, believed to be a student, opened fire inside the high school cafeteria, immediately killing one student and wounding two others. Two others later died from the injuries.

  • Ohio School Shooting: Press Conference

    Chardon School Superintendant Joe Bergant speaks to the media during a press conference at Chardon High School where a shooting took place on Feb. 27, 2012 in Chardon, Ohio. A gunman, believed to be a student, opened fire inside the high school cafeteria, killing three students and wounding two others.

  • Ohio High School Shooting

    Doug Gasper, a ninth-grader at Chardon High School, is hugged by his mother, Sandy, as they leave Maple Elementary School Monday, Feb. 27, 2012, in Chardon, Ohio. Students assembled at Maple Elementary School after a shooting took place at the high school. A gunman opened fire inside the high school's cafeteria at the start of the school day, killing three students and wounding two others, officials said. A suspect is in custody. (AP Photo/Tony Dejak)

  • Ohio High School Shooting: Police Search

    Investigative agents search a home several miles from the shooting Monday, Feb. 27, 2012, in Chardon, Ohio. A gunman opened fire inside a high school cafeteria at the start of the school day Monday, immediately killing three students and wounding two others, authorities said. A suspect believed to be a student was arrested a short distance away. (AP Photo/Tony Dejak)

  • Ohio High School Shooting: Evidence Search

    FBI and local police investigators search for evidence in a rural area of Chardon Township, Ohio Monday, Feb. 27, 2012. A gunman opened fire inside the Chardon High School cafeteria at the start of the school day Monday, killing three students and wounding two others, officials said. (AP Photo/Mark Duncan)

  • Ohio High School Shooting: Prayer Service

    Rev. Jeff Johnson, left, and Bill Mullett lead prayers during a service for victims of a school shooting at Chardon Assembly of God in Chardon, Ohio Monday, Feb. 27, 2012. A gunman opened fire inside the high school's cafeteria at the start of the school day Monday, killing three students and wounding two others. (AP Photo/Mark Duncan)

  • Ohio High School Shooting: Press Conference

    Geauga County Sheriff Dan McClelland addresses the media regarding an early morning shooting at Chardon High School in Chardon, Ohio Monday afternoon, Feb. 27, 2012. A gunman opened fire inside the school's cafeteria at the start of the school day Monday, killing three students and wounding two others. (AP Photo/Mark Duncan)

  • OHIO SCHOOL SHOOTING

    Map locates Chardon, Ohio, site of a school shooting

  • Search For Ohio High School Shooter

    A deputy sheriff searches a wooded area with his gun drawn several miles from Chardon High School in Chardon, Ohio, Monday, Feb. 27, 2012. A gunman opened fire inside the high school cafeteria at the start of the school day Monday, killing three students and wounding two others, authorities said. A suspect believed to be a student was arrested a short distance away. (AP Photo/Tony Dejak)

  • Ohio Shooting

    A group of students and parents pray for victims of a school shooting on the square in Chardon, Ohio on Feb. 28, 2012. A gunman opened fire inside the Chardon High School cafeteria at the start of the school day Monday. Three of the victims have died and two others remain wounded.

  • Ohio Shooting

    A group of students and parents pray for victims of a school shooting on the square in Chardon, Ohio on Feb. 28, 2012. A gunman opened fire inside the Chardon High School cafeteria at the start of the school day Monday. Three of the victims have died and two others remain wounded.

  • TJ Lane

    T.J. Lane, a suspect in Monday's shooting of five students at Chardon High School is taken into juvenile court by Geauga County deputies in Chardon, Ohio on Feb. 28, 2012. Three of the five students wounded in the attacks have since died.

  • Candlelight Vigil

    Students and those in the community embrace one another as they hold a candlelight vigil at St Mary's of the Assumption Church in Chardon, Ohio on Feb. 28, 2012.

  • Candlelight Vigil

    Students and those in the community embrace one another as they hold a candlelight vigil at St Mary's of the Assumption Church in Chardon, Ohio on Feb. 28, 2012.

  • Candlelight Vigil

    Students and those in the community embrace one another as they hold a candlelight vigil at St Mary's of the Assumption Church in Chardon, Ohio on Feb. 28, 2012.

  • Candlelight Vigil

    Students and those in the community embrace one another as they hold a candlelight vigil at St Mary's of the Assumption Church in Chardon, Ohio on Feb. 28, 2012.

  • Candlelight Vigil

    Students and those in the community embrace one another as they hold a candlelight vigil at St Mary's of the Assumption Church in Chardon, Ohio on Feb. 28, 2012.

  • Candleight Vigil

    Students and those in the community embrace one another as they hold a candlelight vigil at St Mary's of the Assumption Church on February 28, 2012 in Chardon, Ohio. Gunman and student TJ Lane opened fire inside the Chardon High School cafeteria that left 3 students dead and two injured.

  • Red Ribbon

    Heidi Marks finishes tying a red ribbon around the tree in front of her home outside Chardon High School, where her son David, 17, is a student in Chardon, Ohio on February 28, 2012. Gunman and student TJ Lane opened fire inside the Chardon High School cafeteria that left 3 students dead and two injured.

  • TJ Lane

    T. J. Lane, center, is led from Juvenile Court in Chardon, Ohio Tuesday, Feb. 28, 2012. Lane, 17, admitted taking a .22-caliber pistol to Chardon High School Monday, along with a knife, and firing 10 shots at a group of students sitting at a cafeteria table Monday morning, Prosecutor David Joyce said.

  • Danny Parmertor

    Danny Parmertor, 16, a junior, was shot along with several classmates while waiting for a bus. Parmertor was airlifted to a hospital and died shortly after. <em>Photo provided via <a href="https://www.facebook.com/pages/RIP-Danny-Parmertor/121146101345306" target="_hplink">Facebook</a> tribute.</em>

  • Chardon High School

    Two students hug on the town square in Chardon, Ohio, on March 1, before marching to the high school to honor the three students who were killed in a shooting there Monday.

  • Chardon High School

    Students and parents march to the high school in Chardon, Ohio on March 1, 2012, to honor the three students who were killed in a shooting there Monday.

  • Chardon High School

    Hundreds of students and parents march to the Chardon High Schooll in Chardon, Ohio on March 1, 2012 to honor the three students who were killed in a shooting there Monday.

  • Chardon High School

    A tribute to the victims of a shooting at the high school Monday, is displayed in the town square in Chardon, Ohio on March 1, 2012.

  • Chardon High School

    Two students hug before hundreds of students and parents march to the high school in Chardon, Ohio on March 1, 2012, to honor the three students who were killed in a shooting there Monday.

  • Chardon High School

    Assistant football coach Frank Hall talks to the media during a news-conference on March 1, 2012, in Chardon, Ohio. Three students were killed by a gunman Monday at Chardon High School. Hall chased the gunman out of the building.

  • Chardon High School

    Hundreds of students and parents march to Chardon High School in Chardon, Ohio, on March 1, 2012, to honor the three students who were killed in a shooting there Monday.

  • Chardon High School

    Residents of Chardon, Ohio, applaud as hundreds of students and parents march to the high school in Chardon on March 1, 2012, to honor the three students who were killed in a shooting there Monday.

  • Daniel Permertor

    People line up outside of Monreal Funeral Home for calling hours for Daniel Permertor on March 2, 2012, in Eastlake, Ohio. Parmertor and two others were fatally shot Monday at Chardon High School. Hundreds showed up for his wake at Monreal Funeral Home in Eastlake on Friday, the same day students returned to classes.