I found this interesting. At this point there only way either of them can get a new trial is if there's new evidence. This test is in development and if it comes available for criminal cases it should definitely be used. Pretty cool. This would help resolve the question of EDTA/ not EDTA results.
http://www.forensicmag.com/articles/...-determine-age
The blood of 22yo Avery should show up as no more than age 27. The blood of 40yo Avery should show up as no less than age 35. If the samples from the RAV4 don't fit, you must acquit.