Really? this is your response to a young man possibly being high and killing two people? Partisan attaboy?Can they prove he was high? (Answer: no they cannot)
If he was driving reckless, that is enough for a conviction. The marijuana stuff just seems like the DA trying turn the screws and goad a plea deal so they can get some adaboys from the partisan locals.
Man, I work for an insurance company and see this mess all the time. Those of you who have the delusion that pot doesn't affect you, You're dead wrong (pun kind of intended for emphasis)