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Episode guide

S3·E6 The Execution of Catherine Willows

Aired November 6, 2002

Synopsis

Fifteen years ago, Catherine helped put John Mathers on death row for the rape and murder of a coed at a nearby college. Her body was dumped in a trash bag, and two other girls found the same way were also linked to the suspect. As the episode opens, Mathers is about to be executed when he's granted a stay based on new DNA evidence. But while Catherine awaits the results of tests on hair samples found on the first victim, another girl at the same school is murdered... and discarded just like the first three - meaning the wrong man could be behind bars.

Source-grounded

Episode recap

In this episode of CSI: Crime Scene Investigation, a case from 15 years ago is reopened when a stay of execution is granted to John Mathers, who was previously sentenced to death for the rape and murder of a coed at a nearby college. Catherine's past case is revisited as new DNA evidence is discovered, and she awaits the results of tests on hair samples found on the first victim. Meanwhile, another girl at the same school is murdered and discarded in a similar manner to the first three victims, raising the possibility that the wrong man may be behind bars. The Las Vegas team of forensic investigators must work to uncover the truth and determine whether Mathers is guilty or innocent. The case is a complex one, with multiple victims and a potential miscarriage of justice. The team must use their advanced forensic methods to examine the evidence and piece together the events surrounding the murders.

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