That would be up to the officer--"hopefully" is about the best it gets on that. If you've got a warrant outstanding, just go ahead and take care of it. It's not going to go away, and the stress of wondering constantly if you're going to be going to jail today is not worth it.
Maybe, maybe not. Typically the officer would either allow the call or make it himself. If you have an outstanding warrant, you need to contact an attorney to take care of this.
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