what's important enough about the jeep that the ricci clan will risk being caught in a complex lie?? somewhere in 500 miles someone had to see something, there will be phone records to comfirm or refute the mechanic's story. ES dna could be explained away by prior ownership. that leaves: fresh ES blood, something tell-tale about the mud or tire tracks if they find a body, they know they were seen and are desperately weaving plausible deniablility, or???
this is a big break for the case.