Malvo's attorney from his first trial, Craig Cooley, told The Associated Press that Malvo only knew what Muhammed told him and was therefore not the best source of true information about the murder.
But it appears clear that the pair did kill Taylor. And somehow, Witz said, knowing what happened has helped her down the road to healing. And potentially forgiveness.
"I want to have forgiveness in my heart," she said. "I want to believe that he is truly sorry. I want to know that he is going to think about this every day. I will probably never find out how this happened. But I want to find closure in my own heart."
"I never wrote to Muhammed," she said. "I am happy to carry hatred in my heart for him. I could care less if he rotted."
Witz said she is still hoping for a letter from Malvo and may at some point seek to visit him in prison.
"My family did not want me to pursue this," she said. "They would be happy not knowing. But that is not me. I want to let go, but I need some answers to do that."
She said that as a mother, she has begun to feel a strange and sometimes uncomfortable bit of tenderness toward Malvo.
"I think Malvo is still a child in many ways," Witz said. "I think he needs to forgive himself before his justice day."
She said that more than five years later, she is still very pained at the thought of how her father died.
Her pursuit of Malvo, the dramatic phone call and her work toward forgiving the young man, it seems, are as much about being a daughter as they are about being a mother.
"I never want my father to be forgotten," she said.