From the NY Times:
RICHMOND, Va. — During the worst campus shooting spree in American history, Virginia Tech officials locked down some administrative buildings and warned their own families more than an hour and a half before the rest of the campus was alerted, according to revisions made in the state’s official report on the tragedy.
The report indicates that students who were initially locked down at West Ambler Johnston residence hall, where the first two victims were killed, were later released from the building by the police and allowed to attend their 9 a.m. classes. Two of those students then went to class in Norris Hall, where they were killed by the shooter.
At least two members of the university’s Policy Group, which was assembled to manage the crisis, let their own families know of the first two shootings, in the residence hall, more than 90 minutes before the group warned the rest of the campus. The new report also says that the university president’s office was locked down about 30 minutes before a formal warning was issued to the rest of the campus.