Plot Synopsis

THE KILLER NANNY is a three-part documentary that focuses on the murder trial of British au pair Louise Woodward, which was televised live in the UK, splitting public opinion about whether she was guilty or innocent. Twenty-five years later evidence is reexamined with new access to witnesses, the defense team, the prosecution, and members of the jury who decided her fate. THE KILLER NANNY made its U.S. debut on Sunday, August 21, 2022 from 9pm-Midnight ET/PT, as Investigation Discovery aired all three episodes back to back:

"Did She Do It?" (9pm): A reexamination of the evidence from Louise Woodward's murder trial 25 years ago, focusing on the case against her; exclusive interviews with the prosecution team and the investigating detective, asking why they believe Louise shook Matthew to death.

"Reasonable Doubt" (10pm): Louise's legal team set out to prove that she didn't shake Matthew to death and that his injuries were caused earlier; two jurors explain why they came to the verdict they did and whether they believed the defense's claim that it was a witch hunt.

"The Fallout" (11pm): Those caught up in the Louise Woodward trial reveal how the case still affects them today, and key prosecution witness Dr Patrick Barnes explains why he's changed his mind about the science.