OK, I've read the Arizona law again, kindly provided to us by Doug in a link to his posting of 30 April 2010 7:21 PM.   

We are--again--getting off track here. Let's get back to the wording of the law itself.

It would be advisable if all parties were to read it, prominent among these being Doug himself.

Doug assures us that no person would be picked up under the new law unless the person is already involved in a non-immigration-related offense.

Fine, Doug.   Exact quote needed, with page number.

The closest thing I have found is "law enforcement officer, without a warrant, may arrest a person if the officer has probable cause to believe that the person has committed any public offense that makes the person removable from the US".

"Any public offense":   that would, it seems, include immigration-related offenses.

So where exactly is the provision that an offense which has nothing to do with immigration must be present before the officer arrests the person?