Our lock up is underground. We get no radio reception. When we bring in an accused, we go underground and pull into a sally port. The doors shut and we are locked in a room. At this point we lock our firearms in a box and transport the accused into custody.
As for custody officers, they are not allowed guns, or weapons. We have foam pepper spray for custody to prevent contamination. Foam spray hits and sticks while mist or spray goes into the air and effects everyone in doors. Tasers are now available with custody sergeants. And hell, they are being used more and more.