Both were convicted of separate Virginia killings in 2003. Muhammad was sentenced to die while Malvo was given a life prison term.

They were sent to Maryland last year to stand trial for six killings in Montgomery County. Muhammad was convicted in May. Malvo is scheduled to be sentenced Nov. 9.

Taylor's daughter, Cheryll Witz, said Malvo's confession brings closure for her and will allow her to move forward.

She said she wrote Malvo a five-page letter in June imploring him to talk to Tucson detectives. She said she understood his life was difficult growing up without parents and understood how he could have fallen under the influence of Muhammad, who was a father figure to him.

Malvo has previously testified that Muhammad trained him to shoot and lured him into a plot to kill people.

"I do believe he was brainwashed and made to kill my father," Witz said. "(Muhammad's) a monster and he set out intentionally to kill people and he knew exactly what he was doing."