Not many doubted CM was in his trunk. The argument was about the exact location of the trunk where the SW said her DNA was swabbed. At the time, several were trying to explain it was on or near the interior seal and some argued it was in the actual trunk.
Brittany Feagans ‏@BF_StarNews -
Swab 668923 was from interior rubber sealer of #EnriqueArochi trunk opening. "Much more than just touch DNA" #ChristinaMorris
https://twitter.com/BF_StarNews/status/555763005460193280
This puts that particular argument to rest. Thank you, BF, for reporting it.
As it turns out, they did find more DNA on the floor of the trunk (I suspect found after they got the car with the last SW). Some are confused as to why EA's DNA would be mixed with CM's and, imo, I would say it is expected his DNA to be found in his car in various places including the trunk. But...if it is determined it is his blood mixed with her DNA...it will be difficult to explain away since we know he sustained some injuries to both arms.