Trujillo said Andersson slammed her into the wall several times and then threw her over the living room couch, when she said she lost consciousness. When she came to, Trujillo said Andersson was on top of her, and forced her over a bar stool.
"He was thrusting behind me and he was trying to do undo my belt, and so I started to kick him with my feet and at that point, I just remember feeling him hitting me on my head. He took my shoe off and he was hitting me with it on my head," she said.
Trujillo said they continued to struggle. She eventually was able to reach for her heel and began hitting Andersson with it.
"I'm screaming, and so I just start [hitting him] and he's laughing. He's laughing when I'm hitting him," she said. "I was just hitting him wherever I could. You know, and he wouldn't let me go. And that's when I was hitting him, and he kind of started to let go, ease up, and then I looked and he's starting to bleed."
Trujillo said that Andersson seemed to pass out, and she called 911 and started CPR. But when the police arrived, Trujillo said they saw her as a suspect.
In her interview with "20/20," Trujillo said she believes that Andersson loved her and became enraged because he couldn't handle the thought of her leaving him.
"I think he wanted to feel like I belonged to him, that I was his," she said. "He loved me. He said he couldn't live without me. He was lost. He didn't want to live without me."
The jury is expected to hear more evidence, including testimony from Andersson's family, on Wednesday before deciding on Trujillo's sentencing. She could face up to life in prison.