After dealing with Glaki, Duanmu Huai set off once again for his journey to Cornwall.
As for the completion of this commission, he had left it to the Foundation to handle. To put it simply, two twisted murderers were operating a guesthouse here, ruthlessly killing their guests. Unfortunately, Mr. James became one of their victims. Upon the arrival of investigators like Duanmu Huai, they became nervous and attacked them in an attempt to destroy evidence, but ended up being killed instead.
The wounds found on the bodies could be attributed to the grotesque torture inflicted by the two murderers.
Well, that's the public narrative - fit for the newspapers.
It was a typical story, much better than saying "two cultists worshipping ancient entities from outer space turned vacationers into zombies here."