At least some content in this article is derived from information featured in Fantastic Beasts: Cases from the Wizarding World. Spoilers will be present within the article.
He attacked Megan Scott and tied her up when she was wandering in a nearby graveyard, but was driven off by a protective unicorn. He had to be Stupified by Mathilda Grimblehawk when she and her partner came to investigate. He later revealed that he was trying to gather valuable unicorn hair, horn, and blood to restore the lost family fortune.