UPDATED DEC. 4: Updated report says some university officials informed their own family members before a campuswide alert was issued.

RICHMOND -- Revisions to a state report on the 2007 mass shootings at Virginia Tech provide more details about the incident and correct factual errors in the original document, but the new information largely reinforces the original findings and recommendations of the panel that investigated the incident.

Gov. Tim Kaine agreed to have the report revised to reflect new details that surfaced after the Virginia Tech Review Panel completed its work in 2007, and to include additions and corrections requested by families of the shooting victims and Tech officials. A consulting firm that worked with the Kaine-appointed panel prepared the revisions, which were provided to family members Thursday night. The Roanoke Times received a copy from a family member.

The panel's original report critically assessed communications failures, ineffective support systems and misunderstanding of privacy laws that limited Tech's ability to prevent the deaths of 33 students and teachers, including the lone gunman, on April 16, 2007. But some family members had hoped the report would go further and assign accountability for the worst campus shooting incident in U.S. history, a sentiment noted in the addendum.

"There are conflicting opinions on whether the Review Panel should have treated certain issues differently, reached stronger or different conclusions, placed blame on certain individuals, or interviewed different people," states the addendum prepared by TriData, a division of System Planning Corp.

"While some of the findings have been modified slightly and one added, none of the new information merited changes to any recommendations in the original Report."

New information that surfaced after the panel's original investigation reinforced one key finding --that the university paid inadequate attention to "red flags" raised about the behavior of student gunman Seung-Hui Cho.

An addition to the report cites more "unconnected dots" and reiterates that Tech administrators and campus police "failed to adequately heed warnings and take the initiative to investigate more fully a long list of frightening writings and aberrant behaviors leading up to the shootings, especially those reported by the resident advisors and English Department faculty."

The panel's findings were not altered by the discovery of a missing file detailing care Cho received at Tech's Cook Counseling Center. The file was found earlier this year by the center's former director, Robert Miller, in his home.

"The papers in the file on Cho provided very little information that the Review Panel did not already have," the addendum states.

The revisions include a corrected and expanded timeline with additional details about the actions taken by police and Tech officials as the shootings unfolded.

They also contain a new finding regarding the death of Emily Hilscher, who became Cho's first victim when she was shot in her dormitory room. Hilscher survived for three hours after being shot and was transported to two different hospitals. But the addendum notes that her parents received no notification that she had been shot until after her death.

The Virginia Tech Review Panel completed its original report in August 2007 and its findings were used to improve campus security protocols and identify mental health reforms and other policy changes for lawmakers to consider. The panel would liked to have had more time, but understood "the importance of getting the main facts and the big picture correct and out to the public as soon as possible," the addendum states.

But Kaine spokeswoman Lynda Tran said the governor also has been committed "to ensure as accurate a factual narrative as possible."