By Abbie Boudreau and Scott Zamost
CNN Special Investigations Unit

Feb 17, CNN

WONDER LAKE, Illinois -- The girlfriend of the gunman who killed five people and then himself at Northern Illinois University last Thursday told CNN that there was "no indication he was planning something."

"He wasn't erratic. He wasn't delusional. He was Steve; he was normal," Jessica Baty tearfully said in an exclusive interview Sunday.

Baty, 28, dated Steven Kazmierczak off and on for two years and had most recently been living with him.

"He was a worrier," she said. He once told her he had "obsessive-compulsive tendencies" and that his parents committed him as a teen to a group home because he was "unruly" and used to cut himself.

He had been seeing a psychiatrist, Baty said, and was taking an anti-depressant. But Kazmierczak had stopped taking the medication three weeks ago, "because it made him feel like a zombie," she said.

"He wasn't acting erratic," she said. "He was just a little quicker to get annoyed."

She knew he had purchased at least two guns. He told her they were for home protection.

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photo: Jessica Baty said her boyfriend, Steve Kazmierczak, gave no warning of the terror he planned to unleash at NIU (CNN)