Shoot dope no dwi for you

I'm just not getting this. If I'm drinking and driving, I get a dwi. The same with smoking pot. Then why is it when a person overdose on heroin behind the wheel, they just narcan them and let them go on their way? Does a herion not count as a dwi?

I work at a gas station and I get a overdose daily if not more. They pull up to the pump pass out cops get called they narcan them cop leaves then the person leaves right behind them.

I don't really care get high its your life idk your struggles but stay out of the vehicle becuase your just going to make it someone else's struggle.

So officers please explain what's going on here...