Do you not see the weakness in this argument?
As you're trying to see this as a juror, do you think it likely that Joey drove the Trooper to the border? And on the basis that the freshest DNA on a surface will be that which is available for collection, that he drove it to the border within minutes of having touched something of Chase's before he had a chance to wash his hands or do anything else?
Where is the DNA of the person who did drive it if it wasn't Chase and it wasn't Joey? Did they manage to drive the Trooper for hundreds of miles without leaving anything behind at all?
All Chase had to do was yawn (if he took it there on the 8th and had been at the house at 2 am I wouldn't be surprised he'd be yawning) and a fine spray of saliva would be enough to contaminate the steering wheel and then a gloved hand after he got in the vehicle.
I'm struggling to see why anyone who is looking at the evidence in a non-biased manner would reject the most plausible explanation for how Chase's DNA got there, and favour an explanation that requires an unproven contact with Chase and ignores the lack of a.n.other murderer's DNA, since Joey most likely did not drive it to the border.
JMO
There is absolutely no reason to prefer transfer over deposit by Chase