This is sounding like the rush limbaugh viagra case. It sounds like coors failed to come to a complete and total stop (maybe) and the cop did not like the results of the first test so he keeps on testing.
Yeah, out west they call that a California stop (at least in Colorado they do) ... slowing down, but not stopping completely, then proceeding. Lived in Colorado for eight years, in that period of time I collected several speeding tickets and one California stop citation. Without question, and I've lived all over this country ... Colorado cops rank as the most chickensh*t. For instance, in Littleton, CO one Sunday AM around 0800 I was given a ticket for going 34 in a 25mph school zone. Summer time, no school, Sunday AM and not a kid to be seen anywhere ... my California stop citation was even more egregious, but you get the idea.
He should be able to get the charges dismissed on that alone.