creeps like him hang out at little-girl-made-to-look-like-a-sexy-grown-up pageants.
And Mama Patsy should have been standing between this creep and her little girl.
Question: HOW would Karr have known the way around the Ramsey house, if he did not have some previous notion of the layout?
Which is why there had to be more than casual acquaintance between the Ramseys and Karr. Karr knew them well enough to enter their house, and act badly in a remote corner where they likely would not hear.