Abominations in Arizona
Dr. Keinhorn lived in the small town of Ekron, AZ. He had apparently created a way to reanimate and control the dead. He attacked the party with his reanimates in the night which prompted them to return to Ekron and investigate. They destroyed all of the reanimates and killed Dr. Keinhorn in his home. His home and (presumably) body were burned by Apache.
It is uncertain what Dr. Keinhorn’s motives were for creating the reanimates or why he chose to do so in such a tiny, isolated town. The party recovered his journal which may illuminate more when and if it is read.