qestion for a novel

[Benjamin Behets]

Hello

I am from Brussels (Belgium). I want to write a novel about an hold up in Crystal City. It will be a fiction but i would like to be as close as possible from the reality. So i have some questions for cops from this area.

I would like to know what kind of guns is mostly used by the cops in Texas.

I would like also to know what is the radio code for a hold up.

I'am sorry for my bad english writting, i do my best.

Tank you very much

Benjamin