Who is Detective Inspector Breece from Martyn Pig and what is their importance?

Breece is the police detective assigned to investigate Dad's disappearance. He is portrayed as being somewhat uninterested in the case, as though he's merely going through the motions. Martyn, and therefore the reader, soon realize, however, that Breece is both determined and intelligent, striving to put the pieces of the puzzle about Dad's and Dean's deaths together to come up with a solution to the crime.