Episode 3: Letters and Lies

This week, AI Investigates brings you something rare… two new episodes back-to-back. If you haven’t listened yet, start with Episode 2: Reading Between the Lines. That episode looked at Sandrine’s diaries and revealed what AI analysis had to say about her own words. What the police treated as proof of suicide turned out to tell a very different story.

Now, in Episode 3, we move into even darker territory.

The Letters

After Sandrine disappeared, two strange letters surfaced. They weren’t written by her. They weren’t written to her. But they were about her, in ways that felt cruel, mocking, and disturbingly personal.

They were signed by someone calling themselves Rosetta Bunton.

Whoever wrote them seemed to know details about Sandrine’s life, and they weren’t speaking with compassion. They were twisting her story.

So what were these letters? A taunt? A warning? A cover-up? Or something even more sinister?

In this episode, we bring them into focus and put them through AI analysis — examining their language, tone, and emotional fingerprint against Sandrine’s own diaries. What comes back doesn’t give us all the answers, but it raises new questions that can’t be ignored.

The Failings

The letters aren’t the only focus. Before they ever appeared, the investigation into Sandrine’s disappearance was already on shaky ground.

For nearly two weeks, the public didn’t even know she was missing. When news finally did break, the coverage was minimal and even contained errors.

Inside the police files, we found decisions, or indecisions, that slowed everything down. Requests were denied. Alerts weren’t issued. Critical steps were delayed. These weren’t technical challenges or unsolvable problems. They were avoidable failures.

And every day lost meant the trail got colder. Every delay meant fewer chances of finding answers.

When you listen to this episode, you’ll hear how these failings stacked up. And some of them will shock you.

Why It Matters

Episode 3 isn’t just about the letters. It’s about the silences and the mistakes that shaped Sandrine’s story before it ever reached the public. It’s about how assumptions, and inaction, can close doors that may never be reopened.

The Rosetta Bunton letters taunt us with words. The files taunt us with silence. Together, they form a picture that feels less like coincidence, and more like a case that was allowed to slip away.

Listen Now

or

👉 Find Episode 3 on your favourite podcast platform

Join the Investigation

We’ll be sharing supporting material inside our Facebook group — including what a simple Google search for Sandrine’s name in 2012 would have shown. The results highlight just how invisible her disappearance was in those early days.

👉 Join our Facebook Discussion Group here

And for those on our email list, we’ll be releasing exclusive excerpts from the AI linguistic analysis of the Rosetta Bunton letters.

📩 Sign up to get access

What’s Next

In the next episode, Episode 4: The Rumour Mill, we turn to the stories that have swirled around Sandrine’s case for more than a decade. Whispers about her character. Theories about what happened that night. Suspicions about the people closest to her. Some of those rumours collapse under scrutiny. Others take on new weight when set against the AI analysis.

And then comes something even more unsettling: a recent claim that text messages exist naming where Sandrine is buried, and who is responsible. If it’s true, it could be the most specific lead in thirteen years. Or it could be just another layer of rumour clouding the truth.

From there, the series moves into Episode 5 where we look at the physical evidence, and analyse the coroner’s conclusions, and Sandrine’s real mental health history, before Christine and Graeme hear the full AI analysis for the first time in Episode 6.

Will it confirm what they’ve always believed? Or challenge everything they thought they knew?