Following independent legal investigation, I have reason to expect illegitimate meddling in the last will and testament of your father-in-law, Mr. Turner. As the sole beneficiary of the invalid will, it stands to reason that you had some pre-existing knowledge or even played a significant hand in these adjustments to the entail.
As a gentleman, I intend to give you the opportunity to respond to these allegations before I bring them to the Department of Magical Law Enforcement. I will however be passing them along by the end of April should I not hear from you.