But it wound up in the Federal courts and SCOTUS agreed to hear the case. In "Caetano v Massachusetts" SCOTUS ruled...9-0...in Caetano's favor. At one point during the decision's narrative SCOTUS referred to the state court's reasoning in upholding her conviction as "frivolous".
I'm sure this guy's appeals lawyers will be aware of this ruling...and other recent SCOTUS decisions.
This, it’s going to get appealed to the USSC, which will slap down the Hawaii SC.