Not trying to defend actions of the troopers, because I don't know all the facts. Does anyone know the speed limit in the area that the husband was going 58mph? I didn't see it listed anywhere, but just from the speed the husband was going you can safely assume, that he was over the speed limit (30mph - 55mph), unless the speed limit was 60mph and above. This would make it a legal stop, as far as the husband, is concerned. You also have to remember, that he was only stopped, and warned, not ticketed. But the husband is an attorney, and he would know how to set up a defense for his case by making up a set of facts that make him the innocent party.
As far as the woman blowing a .00, I've had cases where a motorist was stopped for driving in an erratic manner, which led me to assume that the operator was intoxicated, the motorist blew a .00, but was still charged because there was evidence of the use of a controlled substance.
I've also had two or three instances of a person being arrested for DWI, where he was eventually let go, and the arrest voided, because he was suffering from a medical condition (diabetes, and the low blood sugar level was making him act like he was intoxicated). The individuals were provided with medical assistance, after the determination was made.
I don't feel it's fair to prejudge the incident. Like nw_hunter states, "Be interesting to see how this one play's out"