After all, the Drummonds were strangers and there could be no other reason for their cold-blooded slaughter. However, upon examination of the scene of the crime, there was no sign of anything being missing. The killer had left spent, as well as unused, cartridges at the scene. The broken stock of a rifle was found floating in the river. When officials scanned the bottom of the river, they found an American army carbine.
Unused bullets fit the weapon and the stock matched up to the rest of the carbine.
Gustave revealed that he had found Elizabeth's body while looking at the damage done by a small landslide beside a nearby railroad track. At 1 a.m., he had heard shots. At the same time, his wife Evette had awoken and fed the baby. Gustave' s father, Gaston, corroborated his son's story. He had noticed the Drummonds the night before while he was tending his goats and he, too, had heard the shots.