There are some interesting comments about the neighbor from No35 in Jubes' Book, that are fairly disturbing .... IMO
He describes him as "a fat hairy gorilla of a man"
"Hanging in what remains of his garden are the bodies of dead animals, tied up with string. Walking inside my worry deepens when we find what looks like a kind of shrine at the end of the man's bed made out of a photograph of William, along with quotes of mine taken from newspapers, saying we will never give up trying to find him."
Ref: I Catch Killers Jubelin and Box, Chapter: There's No Death That's A Good Death Pg 1.2