Columbine by Dave Cullen:
In September 2003, the last known layer of the cover-up finally came out. It had unraveled over the course of a full year. It started when someone in the sheriff’s department found some paperwork in a three-ring binder unrelated to the Columbine case. It was a brief police report on Eric Harris. Eight pages from his Web site were attached. They included the “I HATE” rants, boasts about the missions, and descriptions of the first pipe bombs. Eric bragged about detonating one. The report was dated August 7, 1997, more than six months earlier than reports uncovered to date.
The report was brought to the new Jeffco sheriff, Ted Mink. He called a press conference. “This discovery and its implications are upsetting,” he said. “The obvious implication… is that the sheriff’s office has some knowledge of Eric Harris’s and Dylan Klebold’s activities in the years prior to the Columbine shootings.” He released the documents and asked Colorado Attorney General Ken Salazar to conduct an outside investigation.