As someone with expertise in DNA technology (PhD Applied Molecular Biology) you might be surprised to know that running a DNA test to verify his identity need only take a few hours. This could be done in a small lab, which could be mobile/containerised, using a technique such as Y-linked short tandem repeat PCR amplification and analysis.
The most important issues for DNA testing are the have fresh, uncontaminated, and non-degraded samples (no problem in this case
), and suitable samples for comparison with.
From what I understand the DNA comparison was made with DNA from his sister, who died in a US hospital, with additional secondary verification using morphological features (height), in combination with facial recognition technology. One would expect the CIA/U.S. military to be well versed in all these techniques
Can't explain the claimed transit time to the carrier though
WF