William L. Sinclair

Detective William L. "Billy" Sinclair is a character created by Josh Finney for his Casefile: Arkham series of Cthulhu Mythos stories. He made is first appearance in the 2016 graphic novel Casefile: Arkham- Nightmare on the Canvas.
==Description==
A man in his late middle age, Sinclair is a jaded cop working for Arkham Police Department's homicide division in post-WWII America. Slightly overweight and beginning to go bald, he appears to be one of the few officers in the division with any morals.
Sinclair has made the acquaintance of private investigator Hank Flynn and considers him to be "almost" a friend; however, their personal relationship has not stopped him from threatening Flynn with legal action when he refused to leave a case well alone.
==History==
Sinclair was a detective working on the Arkham Slasher case in 1946, but with no leads was getting nowhere. When Hank Flynn shot dead Richard Upton Pickman, the fiend responsible for the murders, he sent an anonymous tip in to Sinclair, allowing him to claim credit for bringing the case to a close.
Three months later, when Flynn shot Edward Pickman Derby after the man attacked him, Sinclair interrogated Flynn about the crime, but did not believe him to be guilty of murder.
==Appearances==
*Casefile: Arkham- Nightmare on the Canvas (2016)
*Casefile: Arkham- Her Blood Runs Cold (2018)
Category:Characters Originating From Expanded Mythos Works
Category:Humans