NEW YORK (AP) -- The man accused of stalking TV host Tyra Banks testified on cross-examination Wednesday that he took a four-day bus ride from Los Angeles to New York where he had no job, friends or family and immediately headed to the studio where the former supermodel tapes her talk show.

Brady Green was arrested March 18, 2008, near Banks' Manhattan studio. He told officers he and Banks "had a thing together," police said.

Banks said she was about to leave the studio that day when her staff warned her about Green. She said they had previously shown her Green's photograph, told her he had threatened one of her employees and was "somebody I should watch out for."

The former Sports Illustrated cover girl said she told officers that arrived on the scene that she was scared.

"I didn't know what to do. How do I live my life when I leave this building? I had never experienced anything like this before," she said.

Closing arguments in the case are set for Thursday in Manhattan Criminal Court. The Dublin, Ga., man has been charged with stalking, harassment and criminal trespass, all misdemeanors.

Green, 39, is accused of repeatedly calling Banks' studio, in addition to showing up there, and sending her flowers and letters. He faces as many as 90 days in jail if convicted by Judge James Burke, who is hearing the case without a jury.

Calm and smiling frequently as she testified, Banks said security "has changed significantly" around her and her workplaces because of Green.

She said that her company has hired more security staff and that her studio audiences are vetted more thoroughly.

Banks said she is now followed everywhere by security guards, even when she runs and exercises outdoors. She said that even though she is a public person, "I don't live that kind of sheltered, protected life. I like to walk around."

Assistant District Attorney Sean McMahon asked Banks whether Green's behavior made her fearful.

"I don't fear for my life," Banks said. "I fear for my safety. I fear for the safety of my staff and for my family. And I fear for the safety of people in my vicinity, who I'm with."

Green testified that Banks' shows on racism and homelessness had moved him and he wanted to contact her. He said his attempts to get tickets for her show had been misunderstood and that he never intended to scare her or date her.

Banks is executive producer and host of two popular TV shows, "America's Next Top Model" and "The Tyra Banks Show."