Wilhelm breaks into tears and says that two men threatened to kill him if he said anything to anyone about their horses.
One man was tall and blonde, with bloodstains on his clothing, and the other was short and dark.
Wilhelm sneaked around to observe where they went in the village. One headed to the Gibbet. The other headed off into the distance, and Wilhelm thinks he was walking after Father Albrecht, the initiate at the Temple of Morr in the village.
Getting all this out of Wilhelm takes a further 5 minutes.