Does the Constitution REALLY Demand that this Fairfax Defendant's Confession be Tossed?

Even though Dinh Pham was "mirandized" before his confession to a double strangulation murder of a mother and child, his attorney claims that Pham was not read his "Miranda" warning soon enough. The WP makes it seem as though this claim actually has merit. Two shocking surprises!

After I locate the so-called "negative" commerce clause in my copy of the Constitution, I'll try to find this one. Don't hold your breath, though.