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:

• A private company sells official CDs of 911 calls made to the Jefferson County Sheriff, along with other materials
• Salon.com has posted most/all of the sheriff's report and audio-visual materials, and the Rocky Mountain News has similar materials.
• The Rocky Mountain News maintains a large archive of stories, video and audio
• A collection of 911 call logging tapes
• The Denver Post archive of stories and materials

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