I'm in my late 20's and have had (and still have) an above average party life over my years. I have seen people drink and drive (especial in rural settings) many times and have myself questioned whether or not I would "blow over" after 2 drinks over dinner/wings on no more than 3 occasions. The fact that someone gets caught is far less disappointing than the fact that the person has got away with it on many occasions - Conservative estimates show first-time DUI has driven drunk 80 times prior to being arrested according to Wisconsin Department of Transportation. I think someone that has reason to believe a person is driving while intoxicated should be at risk of being charged with obstruction of justice/being an accomplice (including drive-thru workers) or at the very least be at risk of a hefty fine. If people know they are unlikely to be caught the majority of them will continue to drink and drive.
I have also played with high-end breathalyzers and found them to be a relatively inaccurate way to measure impairment. The depend largely on blood volumes and would often lower as more time went on/liquor was consumed. They literally measure the amount of alcohol in your blood and do not account for tolerance, blood volumes and actual impairment levels. Field sobriety tests are however quite accurate and cops are very well trained to assess DUI's.
DEAR Raptors and JV - I think the best way for the team to handle this from both a PR and strategy is (assuming admission to DUI) to immediately suspend him for "conduct detrimental to the team" etc for most if not all the remainder of the regular season while publicly making it clear that this will not be tolerated under this organization (for all the talk of only bringing in "character guys"). Also make a large sum donation to MADD etc (preferably from his pocket) and have JV volunteer to a few hundred hours of community service of their choice. Then the right message will be made in the media and the NBA will be put in situation to lessen or dismiss their suspension during the playoffs/next season while also likely lessening the pressure on the courts to make an example of him as a celebrity/public figure.