Nah... it will only identify Saddam's doubles. Saddam is a germ-phobic, remember? He wouldn't let someone stick a needle in his arm to get all that blood. Let the doubles do it, yeah, they'll do anything.
We may have clothing from him from way back when and a talented dog, and then there's the barber of Baghdad who sold us his hair cuttings for 1 Mill and the plastic surgeon with the Saddam mold and the manicurist who kept the cuticle nippings.
We have lots of ways of identifying him, I'm sure.