# M. Caux — The Mystery of the Blue Train character guide

> M. Caux in The Mystery of the Blue Train by Agatha Christie.

**Role:** minor

**First appearance:** 0012-xi-murder

## Who they are

A police officer assisting in the investigation in France.

## In the story

### [XI: Murder](https://www.betterreads.dev/discover/the_mystery_of_the_blue_train_se/chapters/xi-murder)

Commissary of Police; conducts the initial investigation and discusses theories with Poirot.

### [The Comte de la Roche](https://www.betterreads.dev/discover/the_mystery_of_the_blue_train_se/chapters/xv-the-comte-de-la-roche)

The Commissary who agrees with the theory and discusses the Comte's criminal history.

### [An Aristocratic Gentleman](https://www.betterreads.dev/discover/the_mystery_of_the_blue_train_se/chapters/xvii-an-aristocratic-gentleman)

Present during the interrogations and comments on the suspicious behavior of Kettering and Mirelle.

## Links

- HTML: https://www.betterreads.dev/discover/the_mystery_of_the_blue_train_se/characters/m_caux
- Book: https://www.betterreads.dev/discover/the_mystery_of_the_blue_train_se
- All characters: https://www.betterreads.dev/discover/the_mystery_of_the_blue_train_se/characters