The trooper didn't care about the truth. He lied in court... twice. We mentioned a third party witness at the scene - they never questioned them. There was no statutory definition of a term. The dictionaries had only one open ended definition for the term. We wrote to the state agency that is the authority in that area to see what guidance they have on the activity - they said it's legal (even if they didn't, the rule of strict construction requires ambiguity to be favorable to the defense). The people in the system didn't care. The trooper also knew that the other party committed a crime, but declined to charge them. What a one sided system... again, truth doesn't matter when they treat you as guilty until proven innocent.
But, in theory it should be different.
The most important things prosecution does are: decide who to prosecute, decide when to ask for bail, decide what sentence to ask for. This all has a lot more to do with societal values than making a strong case.