+1 to what Tex said, however the police as whole have been instructed to do it more regularly now as of Saturdays meeting. So I do encourage anyone on patrol, if you're radioing in front of someone, don't just stop talking say something to the effect of 'One moment sir, just had a call across the radio' then proceed with 'This is Kilo Victor 1 to Kilo Victor 3, unable to attend chase at this time, currently involved in another incident, over' If anything it only benefits RP. If you're worried about revealing or missing something critical, just tell the civilian, you've just got to pop to your car as a priority call has come over the radio. then come back to him once you're finished radioing, at least then everything is within roleplay and these silent periods or hidden comms to your mate as to whether you should arrest the man or not don't happen. If you're talking with your mate, have the confidence to do it ingame.