[Noah_SannTek]

Apologies, one thing I forgot to mention is that once reasonable suspicion is established, and an arrest happens, if you aren't blowing over 0.08 for alcohol, police will request a blood test. It's possible that for frequent users, THC will show up in these blood tests even though they haven't recently smoked. If an officer screens you on our device (which only has a 3 hour window of detection) and there is no THC, they have no further reason to request a blood test. Thoughts?

[verall]

(American viewpoint about this device being potentially used in America. Courts and policing is different in Canada, and so my feelings here aren't neccesarily how it would work out there)

In many (most?) states you can refuse the blood test, until they get a warrant, even though you cannot refuse the Breathalyzer. I believe this will be used as a tool to make arrests and generate probable cause which will then immediately be used to obtain a warrant and blood test, which will hold up in court much better than the Breathalyzer alone or nothing at all.

I'm sorry, but even if this product works perfect technically I see it harming more people than it helps. Throw in chance of false positives and likely hood it is used by biased individuals in a biased way (only some individuals are told to blow multiple times, etc) and I really believe this product deployed in America would have a negative impact on most people.

[slg]

>It's possible that for frequent users, THC will show up in these blood tests even though they haven't recently smoked

That leaves reasonable doubt. Reasonable doubt favors the accused. If your device removes reasonable doubt, it does not benefit the accused.

[aianus]

The device adds reasonable doubt over the status quo in the case where a blood test shows positive for THC and the device shows negative.