The Colorado Bureau of Investigation's report will be made public on Tuesday and 9NEWS.com will post the majority of the report no later than 3 p.m.
Emily Keyes, a 16-year-old junior, was fatally shot during the standoff with 53-year-old Duane Morrison on September 27. Morrison then killed himself.
Keyes was one of seven girls taken hostage by Morrison. Five were released before SWAT officers raided the classroom.
Keyes' parents talked to 9NEWS after they saw the report and say they were grateful to be able to read parts of the report early, including the summary. They say a lot of their questions were answered.
They released a statement Monday night saying in part: "For some it may be difficult to accept. The right actions at the right time by the right people may not have the right outcome. When what we hoped for didn't happen, some may want to find fault. But there is no fault to be found in the command decisions made given the information and behavior presented. There is no fault to be found in the courage and speed of their response."
"From our family, there is only respect. Our review of the CBI report confirms this belief," said the statement from John-Michael, Ellen and Casey Keyes.
You can read their entire statement by clicking here.
The report shows Park County Sheriff's deputies and the CBI collected at least 178 pieces of evidence and interviewed more than 124 people in the investigation. They also followed up on dozens of tips.
Also included in the report are the 911 calls made from the school, school surveillance video, and the 14-page suicide letter Morrison mailed to his brother before he got into the school.
There is also the FBI analysis of the suicide letter and the CBI's summary of the investigation.
9Wants to Know has learned the report also discusses, in detail, why incident commanders decided to breach the classroom when they did. Morrison had set a deadline of 4 p.m., and SWAT officers were very concerned about what he might do.
The Park County Sheriff's Department is holding a news conference at 3 p.m. Tuesday to release the full details of the CBI report. 9NEWS.com will stream the event live.
The report is seven volumes, but not all of it will be released to either the families or the public.
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