I just came across another tidbit from another case I've followed for literally decades. The Colonial Parkway Murders. Probably the best podcast - or any medium for that matter - to listen to is "Mind Over Murder" with the brother of one of the victims, Bill Thomas.
In the 01 March episode he and his co-host interview a criminologist, Dr. Laura Pettler. About 10 minutes into the episode she drops this quote: "You don't leave a crime scene like you entered it." Meaning that psychologically the killer leaves with a different state of mind than when they entered. Emotions are higher, apprehension or realization of consequences is high. Because of this murderers have been known to commit traffic violations such as running a red light or stop sign, speeding, etc. Her suggestion is to check traffic violations as far out as 100 miles from the scene.
It would be interesting to know if LE did that here.