Librescu's family said his last moments were recounted in numerous e-mails from students after the attack.
''My father blocked the doorway with his body and asked the students to flee,'' Joe Librescu told The Associated Press after the massacre. ''Students started opening windows and jumping out.''
As the students jumped, Librescu was shot dead, one of the 32 victims in the worst shooting rampage in modern U.S. history.
One deliberately and with aforethought puts himself on the line.
Outspoken Zimbabwean Roman Catholic Archbishop Pius Ncube said in an interview published on Tuesday that he understood that he may lose his life over his continued critical stance against President Robert Mugabe's regime.
In an interview with The Daily Telegraph while on a visit to London, Ncube also criticised the leaders of Zimbabwe's neighbours for not doing more to avert the ongoing crisis there.
"The Church has a prophetic role to speak the truth when no one else dares to," the Archbishop of Bulaweyo told the paper.
"I accept that it may mean that I lose my life."