A South Carolina woman is speaking out after being found “chained like a dog” while allegedly held captive by a suspected serial killer, telling Dr. Phil McGraw that she did what she had to do to survive.

Kala Brown, 30, was rescued from a shipping container, two months after she and her boyfriend, Charles Carver, had gone missing from their Spartanburg home, officials said.

The large crate was found on the property of Todd Kohlhepp, who police fear may be a serial killer.

In an exclusive interview with Dr. Phil, Brown said the 45-year-old registered sex offender made her watch as he killed Carver.

Read: Cops Say Suspected Serial Killer Met With Mom Before Confessing to Quadruple Murder

“He shot Charlie in the chest three times; he said it was easier to control someone if you took someone they loved,” Brown tearfully told Dr. Phil, in an interview set to air in two parts on Monday and Tuesday. “He let me know that if I fought back he would kill me. And then he raped me.”

Brown said he had prepared the metal shipping container for an extended stay.

“He had a lot of shelving with dried food and rations and stuff, and lots of bottles of water,” Brown said. “He took me all the way in the back. He left me bound and he also put a chain around my neck.”

Read: Neighbors of Man Accused of Holding Woman Captive: We Had a Bad Feeling

Ultimately, Brown said that Kohlhepp hoped she would one day fall in love with him.

“He didn’t want to kill me, he wanted to keep me; that’s why I did what I had to do to survive,” she said. “No matter what he did to me, he did not break me. He cannot destroy me and I won.”

Kohlhepp has allegedly confessed to killing as many as seven people, police said. He remains in custody in the Spartanburg County Sheriff’s Office.

Watch: Hear the Desperate 911 Call From Woman Held by Alleged Serial Killer