Hey Frank, the moniker is based on the definition of the word, not some Hollywood show you might be watching.
Please accept my apologies.
I always assumed it was for the Dragnet show on radio 1949-1957 and TV 1951-1959 and 1967-1970. And the Dan Ackroyd and Tom Hanks movie.
I know of course it is a term from the old days.
First for catching fish since the stone age and then for police work.
Please accept my apology.