The girlfriend of the man who killed five people and himself at Northern Illinois University said that he called her early on Valentine's Day, the day of the shooting, to say goodbye. Steven Kazmierczak "called me at midnight and told me not to forget about him," said 28-year-old Jessica Baty. She said she had no indication he was planning anything. Investigators haven't determined why 27-year-old Kazmierczak opened fire at the school. The day of the shooting or the day after, Baty received a package from Kazmierczak containing two textbooks, a cell phone and what she characterized as a "goodbye note."