DEKALB -- Just before Thursday's shootings, Northern Illinois University killer Steve Kazmierczak sent a girlfriend a package with a note saying not to open it before Thursday, sources told the Sun-Times.
Ominously, the note said, "and you'll know why," she told authorities.
When she opened the package, she found ammunition, sources said.
As they searched for reasons Kazmierczak shot to death five NIU students and himself Thursday, authorities interviewed the girlfriend, who lived with him in Champaign, sources told the Sun-Times. She told authorities Kazmierczak had gone off his medications and had been moody, sources said.
Did they really break up?
But Jim Thomas, a professor who was a mentor to Kazmierczak and also taught the girlfriend at NIU, said he's not so sure they had broken up.
"Don't believe everything you hear. Relationships are like that. . . . [They were] two college kids in their mid to late 20s. They had the exact relationship issues everybody else has. . . . I saw nothing in their relationship I didn't see in anybody else's.''
Thomas said she's devastated by the murders.
She "is a normal, wonderful, warm human being. The press has hounded her," said Thomas, a professor emeritus of sociology. "I consider her a friend. . . . Anybody in this position would be devastated. . . . You would be devastated and confused if there was no indications."