What happened at Morriton Manor?

The puzzle goes off well: what happened on Morriton Manor?

Mystery

Hauke Gerdes

(Spielleiter)

Etienne Gardé

(Francois Guillaume de Tesseraque)

Daniel Budiman

(Earl D. Winston)

Nils Bomhoff

(Lord Henry)

Simon Krätschmer

(Graf Thaddäus Montgomery)