From another article, it turns out that they did pay the toll at the toll booth too. The second car paid both tolls:
Around midnight Thursday, one of the cars, with Illinois plates, reportedly drove through a toll booth on Interstate 75 in Collier County, Fla., near Naples, without paying. A spokesman for the Florida Turnpike said the driver of a second car paid both tolls.
http://www.suntimes.com/output/terro...-terror14.html