[VisualizeSmallerGovernment]

Michael Wagner lied about his name.

Then how do you know he's Michael Wagner?

[cardinal4]

Then how do you know he's Michael Wagner?

He did time, his prints were on file..

[philman_36]

Then how do you know he's Michael Wagner?
That's an easy one.
Wagner, a Navy veteran...
A simple search of the government's fingerprint database probably found him. All vets have their prints on file. Prints are taken when you enlist.
Prints are sometimes sent for analysis by that database.