While I'm not happy to see a bunch of drunk drivers run free, it's a necessary evil. I hope this becomes precedent throughout the country, forcing manufacturers of devices used to send people to prison to be OPEN about how their devices work down to the source code. Besides, it's the defendant who's paying for the code review, not the taxpayers, and they should have the right to be allowed to review the code for a presence of a bug in the software may cause people to test over the limit regardless of their sobriety.
Can you imagine death-penalty murder trials with "we know you did it because this machine we bought from MegaProfitTechCo analyzed the crime scene and says you're guilty." "How does that machine even work? DNA profiling?" "Can't tell you, it's a trade secret and very complicated, but it took a piece of evidence and said you're guilty."