Although don't think it really fits here.
I'd have to agree. It's not 'wrong'. Just not "modern"! Of course, not everything "modern" is 'right', either!
Not many on this side of the "pond" would use "guv". While we do have "governors", they aren't as common as they were in the UK!
The phrase also lead me to wonder about "cop" in terms of 'catching' as it relates to a policeman who is sometimes referred to as a "copper" due to the buttons on their uniforms that were often made of copper... Words are fascinating, in any language!