I THINK and I am by NO means defending this decision, what the state is saying is that cocaine remains in your blood for much longer than alcohol or pot, I think for up to 2 weeks and the test that they do just tests for any cocaine, so this scum bag COULD have done the cocaine on the day of accident or a week before the accident, but since it stays in the blood longer, with the test that they used, they cannot prove either way which it was. This however does not excuse them for not testing further for the amount of cocaine in his blood, which would be an indicator of when he might have used the cocaine.