Prosecutors of Christopher Vaughn, who is accused of killing his wife and three children, played videotape of investigators questioning him about the crime, and which indicated he was emotionless when told his family was dead.
In the videotape, Vaughn said, "No, that's not possible," when told by State Police Sgt. Gary Lawson that his wife and kids "are all dead."
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Prosecutors claim Vaughn of killed his family in a scheme to start a new life in Canada. They say he visited a gun range for target practice the night before the slayings.
The Joliet Herald News reported Monday Vaughn maintained his innocence in the videotaped interview, of which jurors saw a brief segment. They heard Lawson ask Vaughn if he killed his family. Vaughn answered "I could never."