Prosecutors called Dianne Ogden, a music talent coordinator, to support its case that Spector's pattern of threatening women with guns led to the killing of actress Lana Clarkson, who was shot at Spector's suburban Alhambra mansion on Feb. 3, 2003.
Ogden testified Monday that Spector seemed to undergo a personality change as she tried to leave another Spector mansion in Pasadena after a party in 1989.
"He was screaming at me, the F-word," she said. "He wasn't my Phil, not the man I loved. It wasn't him. He was demonic. It scared the hell out of me."
Spector sat stone faced, as Ogden described the terror-filled night at his home, reports The Early Show national correspondent Hattie Kauffman. She said he first approached her with a rifle, then picked up a pistol and "he put it all over me, yelling things."
"I said please put the gun down. And he goes 'no'," she said. "He said he was going to, like, blow my brains out, you know, by gunpoint! That was not romantic to me!"
"It was like he was taken over by something. It wasn't Phillip."
At one point, she said, Spector ordered her up to his bedroom.
"Did he try to be intimate?" asked Deputy District Attorney Pat Dixon.
"Yes he did," she said. "He did it by gunpoint. He wanted to rape me."
Ogden said Spector tried to have sex with her and it was "icky."
"I had never had a sexual relationship with him," she said.
"Did you that night?" asked Dixon.
"He tried," she said.
The next morning, the witness said, she awoke to Spector singing in the shower "like nothing had happened."
In the midst of her testimony, Ogden interrupted the prosecutor to make clear that she was only testifying because she had been subpoenaed.
On the stand, Ogden said that over the years she would hear from Spector occasionally and he would send her birthday cards and roses.
She said she broke off contact after she went to his house again for a gathering with two old friends and when she got up to leave, "Phillip from behind me said, 'You're not going anywhere.' He said, 'I have an Uzi with me and I'm going to kill you.'
"I said, 'Phillip don't do this to me again. You've been drinking.' "