If a cop withdraws to confer with anybody who is not physically at the scene you can pretty much guarantee they already know they are on shakey ground at best.
Some states do have "stop and ID" laws that require you to produce your identity document. Other states have laws that merely require you to state your true name and place of residence when asked to ID yourself to the cops. It's important to know what your state's law says. Not even going to open up the can of worms that goes with some states' requirement to have a permission slip to OC.