We've gathered the pertinent portions of the official Jefferson County (Colo.) Sheriff's report on communications, response, responding agencies, command structure and other issues. The full report is available here.

Other resources:

• The Rocky Mountain News has a page with links to audio tapes and transcripts of 911 calls
• A private company sells official CDs of 911 calls made to the Jefferson County Sheriff

Also review our Columbine material that was posted shortly after the incident occurred:

• 911 telephone call transcripts
• Jefferson County Sheriff's dispatch radio transcript
• Series of e-mails and other on-scene reports
• Shooting Chronology
• Timeline in graph format
• Collection of stories from local newspaper