[Blood of Tyrants]

"These individuals were not given any choice; they were simply told they have to provide their ID or they'll be cited for refusal to do it -- for obstruction," said Gold.

Get a lawyer. Unless you are operating a vehicle on a public street, you have no obligation to show ANY LEO your "papers".

[piytar]

Yup, at least without a reasonable suspicion the person is a criminal. See this article on the Racine case mentioned in the article.

[bjorn14]

In some places it is illegal to walk around without carrying ID.