The only reason it was revealed that it was actually murder is because the main killer decided to confess in 2009, nearly 20 years later. He was also a sex offender and abused female patients under sedation in his dental practice, and there was evidence of CASM found on one of his laptops.

Further reading/viewing:

• The book Let This Be Our Secret by Deric Henderson.
• A 2016 miniseries entitled The Secret starring James Nesbitt as Colin Howell.
• A 2026 two-part documentary from the BBC entitled Confessions of a Killer, in which we hear police interview tapes from Colin Howell and learn about the fate of his accomplice’s final appeal of her sentence.