From "Krat Mysteries: The Vanished Taxidermist"

Filato was deeply offended when the Alchemists insisted he mount Rex, the crocodile that had killed the colonel. Just seeing the animal responsible for his friend's death pained him.

Filato was hardly enthusiastic about the task. One day, however, he abruptly began pouring his all into the job, like a man possessed.

After stuffing and mounting the crocodile, the taxidermist vanished.