Last Updated Sep 12, 2014 1:55 AM EDT
LIMA, Ohio - The convicted killer of three Ohio students at a high school cafeteria escaped from a prison Thursday night and was recaptured after a search in northwest Ohio, state troopers said.
Nineteen-year-old T.J. Lane escaped along with two other inmates from a prison in Lima, about 80 miles south of Toledo, and one of the inmates was recaptured son thereafter, Lima police Sgt. Andy Green said.
A search was underway in woods and a residential area near the prison, and Lane and the third escapee were considered dangerous.
Authorities said they didn't believe the two men were armed, however, and said they had no information on how the inmates got out. Green said the police were notified about 8 p.m. Thursday evening.
Lane, then 18, pleaded guilty last year to shooting three students in February 2012 at Chardon High School, east of Cleveland. He said he didn't know why he did it. At his sentencing, he unbuttoned his dress shirt to reveal a T-shirt reading "killer," and cursed and gestured obscenely as he was given three life sentences.
Chardon Police had extra officers on duty to keep Lane's victims' families safe, CBS News affiliate WOIO reported.
Authorities identified the other inmate as Clifford E. Opperud, 45, and said he was serving a sentence for aggravated robbery, burglary, and kidnapping.
Prosecutors say Lane took a .22-caliber pistol and a knife to the school and fired 10 shots at a group of students in the cafeteria. Daniel Parmertor and Demetrius Hewlin, both 16, and Russell King Jr., 17, were killed.
Lane was at Chardon waiting for a bus to the alternative school he attended, for students who haven't done well in traditional settings.
Before Lane's case went to adult court in 2012, a juvenile court judge ruled that Lane was mentally competent to stand trial despite evidence he suffers from hallucinations, psychosis and fantasies. At his sentencing, Lane was defiant, smiling and smirking throughout, including while four relatives of the victims spoke.
Reached Thursday at her home in Chardon, Dina Parmertor, mother of Daniel Parmertor, said of Lane's escape: "I'm disgusted that it happened. I'm extremely scared and panic stricken. I can't believe it."
Ohio public safety and correction officials said they began an "extensive search," along with local authorities and the Ohio State Highway Patrol after the inmates escaped at 7:40 p.m. Thursday from the Allen Oakwood Correctional Institution.
"All available troopers from the Ohio State Highway Patrol have been joined by Allen County Sheriff's deputies and local area law enforcement in establishing a perimeter and searching the area," Ohio Department of Public Safety Director John Born said. "A Patrol helicopter with advanced infrared detection equipment has been deployed and is engaged in the search as well.
Born encouraged the public to call 911 of any suspicious persons or possible sightings.