Mobile or portables? Most of the patrol cars have APX6500 mobiles. If you ask an officer nicely, he might be willing to turn the radio off, then press the home button 5x while it powers up and it will scroll the flashcode for you.
But it WILL have at minimum TDMA P25 trunking and AES256 encryption. The RCS has some GPS and OTAP/R going on, but not sure SD City is doing any of that.
Paul