Ep 5. In 1986, while undertaking the burglary of a house, David Lewis was surprised by the return of the homeowner, 74-year-old Myrtle Ruby, fired a gun and shot her dead. US Federal law prohibits States from executing the mentally disabled, which is defined as somebody with an IQ score of below 70. David Lewis’ IQ score has been officially recorded at ‘between 71 and 85’ meaning he is classified as “borderline” mentally impaired. His defence argued alternative testing methods declared his IQ was lower than 70.
Watch ten-part true crime documentary series #IAmAKiller Tuesdays at 9pm
The I Am A Killer podcast is an A+E Networks UK production for Crime + Investigation, and is hosted by Tom Adams and Danny Tipping, produced by Steph Nardilli and Sam Pearson, and edited by Susanna Lawrence