In a general sense, in the United States, how would the court system proceed in a criminal case against a person who cannot be and refuses to be identified?
For example: a person is arrested and charged with a fairly significant offense (let's say armed robbery). However, he will not give his name and has no identification on his person, police cannot discover his identity through their systems (fingerprinting, etc), and no one comes forward who knows him.
How would the average court system handle this case?
If it is related, how would the defendants Fifth Amendment rights apply to their decision to refuse to identify themselves? Are they within their rights to do so throughout the entirety of the proceedings, or at some point are they at risk of being in contempt?
Lastly, would this hypothetical unnamed defendant carry a criminal record after they served their sentence if found guilty, and their identity never discovered, and how could that be possible?