Victim's lawyer charges sheriff's department with hiding details of high school massacre.

Jocks say Littleton killers were gay, but friends deny it.

Experts discuss the right lessons -- and the wrong ones.

The long-delayed CD-ROM details the events of the massacre but fails to answer the central question: Why?

Post-Littleton, paranoid media pundits seem blind to the line between the computer screen and reality -- just like the killers.

Video footage made by Eric Harris and Dylan Klebold leaves unanswered questions about whether their parents could have stopped the massacre at Columbine.

Black people take secret -- and unwarranted -- comfort in the fact that mass killers tend to be white.

A new analysis of the writings of various shooters finds a common strain of paranoia

It's the out-of-touch adults, not kids, who misread music lyrics.

Uncut text, video and audio from the year-long investigation into the tragedy.

A "suicidal" senior was arrested after vowing to "finish the job" on the eve of the six-month anniversary of the massacre.