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.
- Mathilda Grimblehawk: "We're with the Ministry of Magic, Mr Crump. We suspect you're planning some kind of mischief."
- Silas Crump: "Who, me? Silas 'Saintly' Crump? Never done mischief in my whole life! […] Entrepreneurial, that's me. Self-sufficient! I'm a shining example to the wizarding community."
- — Mathilda Grimblehawk and her partner confront Silas Crump at the Leaky Cauldron[src]
Silas Crump was a petty criminal who had been evading capture by Officer Cerberus Langarm from the Ministry of Magic's Department of Magical Law Enforcement. This was due to the fact that he had never been caught red-handed.
Crump may have been in Slytherin House at Hogwarts School of Witchcraft and Wizardry as there was a Slytherin scarf in his rented room at the Leaky Cauldron. There was also a Chudley Cannons flag in his room, so he was probably a supporter.