Is There a Serial Killer Relative?

In 1927, a four-year-old Billy Gaffney was playing with his friends and brother on the roof. A weird grey man started watching them and Frances ran over to see what he wanted because again, 20s. While his friends were focused on the game, Frances and the man both disappeared. The newspapers described Frances as having been "atrociously assaulted" In spoiler alert, my relative who killed people is going to wind up having a cameo in the source.