Rentals are used for major trafficking, that way their personal vehicle isn't seized. Rentals always get the senses tingling, then where you coming from, where you going, etc. Does the time line make sense?
I had one guy tell me he had left Boston when I stopped him, how long ago? About 7 hours ago. Did you stop anywhere along the way? Nope. So you have not stopped anywhere since leaving Boston to where we are here talking? Nope. And you left 7 hours ago? Yep.
Boston is 3 hours away, that's what we call a clue.