I imagine they did the same for Osama. Plus it is reported that they can do a DNA match with his sister. I don't know if they had a relatives' DNA sample they could match up with al-Zarqawi.
But when was it SOP to turn the body of any KIA over to some other entity for verification as claimed by Candor7?
I guess Bush was just too insensitive to give Zarqawi a Muslim funeral and get him in the ground within 24 hours eh? Because there darned sure wasn’t time to autopsy and x-ray bin Laden.