Speaking on ABC's "Good Morning America" on Thursday, Mr. Shatner said he was fascinated by Malvo's turnabout, "the fact that remorse creeps into his life."
"He was a kid who was brainwashed. He was a malleable teenager and lacking love in his life," Mr. Shatner said. "John Muhammad supplies the love and influences him to become a killer, and he becomes a coldblooded killer at the age of 17. Now he's in jail, and now he begins the turmoil in his mind."