Langman

Peter Langman, author of Why Kids Kill: Inside the Minds of School Shooters, says the vast majority of marijuana-using teens never commit acts of violence.

Tampa police foil school-attack plot 2011

Parents and even private citizens with no link to a child can help prevent school shootings, says Peter Langman, a psychologist and the author of Why Kids Kill: Inside the Minds of School Shooters (Palgrave Macmillan).

Lessons from Columbine: More security, outreach in schools 2009

"These are not ordinary kids who were bullied into retaliation," psychologist Peter Langman writes in his new book, Why Kids Kill: Inside the Minds of School Shooters.

10 years later, the real story behind Columbine 2009

Peter Langman, author of Why Kids Kill: Inside the Minds of School Shooters, says the vast majority of marijuana-using teens never commit acts of violence.

Tampa police foil school-attack plot 2011

"On the other hand, when you look at school shooters, a lot of them have been in contact with drugs and alcohol," Langman says.

Tampa police foil school-attack plot 2011

Langman, whose book profiles 10 shooters, including Harris and Klebold, found that nine suffered from depression and suicidal thoughts, a "potentially dangerous" combination, he says.

10 years later, the real story behind Columbine 2009

Klebold, on the other hand, was anxious and lovelorn, summing up his life at one point in his journal as "the most miserable existence in the history of time," Langman notes.

10 years later, the real story behind Columbine 2009

Parents and even private citizens with no link to a child can help prevent school shootings, says Peter Langman, a psychologist and the author of Why Kids Kill: Inside the Minds of School Shooters (Palgrave Macmillan).

Post-Columbine programs help prevent rampages 2009

Parents and even private citizens with no link to a child can help prevent school shootings, says Peter Langman, a psychologist and the author of Why Kids Kill: Inside the Minds of School Shooters (Palgrave Macmillan).

10 years later, the real story behind Columbine 2009

"On the other hand, when you look at school shooters, a lot of them have been in contact with drugs and alcohol," Langman says.

Tampa police foil school-attack plot 2011