Police did not find any explosives after a three-hour search of the building.
Police say they believe the three victims may have been shooting at each other, but are still investigating.
The shootings happened in the same place and almost within 24 hours of each other.
Police said the shooting was an accident and no arrests have been made.
No arrest has been made following Friday morning's TU Alert.
A trial date has not been set in the case.
Police say there is no information on the shooter or motive.
The 30-year Campus Recreation employee died Wednesday of cancer.
Police sent two TU Alerts to students Friday evening and early Saturday morning.
Though his tenure as president ended in 2000, Peter Liacouras was often seen cheering on the men's basketball team at home games.