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Now Playing: The interrogation video of Chris Watts
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Now Playing: Tapes reveal Chris Watts confess to murdering wife
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Now Playing: Notorious serial killer Ted Bundy is executed at Florida State Prison: Part 11
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Now Playing: Days before his execution, Ted Bundy begins confessing to murders: Part 10
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Now Playing: Ted Bundy is convicted and sentenced to death in Florida Chi Omega murders: Part 9
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Now Playing: Florida police arrest Ted Bundy, who initially refuses to reveal his identity: Part 8
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Now Playing: Ted Bundy kills two women at Florida sorority, severely injures others: Part 7
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Now Playing: Convicted kidnapper Ted Bundy escapes not just once, but twice from custody: Part 6
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Now Playing: Ted Bundy is arrested and found guilty of kidnapping in Utah: Part 5
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Now Playing: Ted Bundy moves to Utah where one woman is able to escape from his grasp: Part 4
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Now Playing: Witnesses recall a man named 'Ted' at lake where women were abducted by Bundy: Part 3
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Now Playing: Ted Bundy murders women, whose disappearances cause fear around Washington: Part 2
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Now Playing: Who was Ted Bundy, the notorious serial killer who murdered dozens of women: Part 1
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Now Playing: Ted Bundy's last victim: Remembering 12-year-old Kimberly Leach
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Now Playing: How serial killer Ted Bundy was able to escape from custody after he was arrested
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Now Playing: Ted Bundy: Who was the notorious serial killer who murdered women across the US
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Now Playing: 'Everyone really liked him': Ted Bundy's former friend, classmate on the Ted they met
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Now Playing: State trooper who arrested Ted Bundy on what he found in the serial killer's car
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Now Playing: Convicted murderer maintains innocence, denying all accusations against her: Part 11
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Now Playing: Jury find woman guilty of killing husband, attempting to murder daughter: Part 10