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probably admitted driving and drinking. probably had evidence from the airbags going off putting him in it. "I had 2 beers" or whatever with an admission. they can put some pieces together let the courts sort it out...which leads to....

Cases tossed attorneys do their job. plenty of people take plea deals before hiring a real attorney try to get them off. money buys attorney to find crack in the case, exhaust all options. Options that often get reduced charges or toss the case

Local story, woman slammed guy walking 2AM on saturday night, implanted thru the windshield and died. She pulled into closed dark area, called friends a dozen times, everybody but 911. Somebody comes, picks her up, 2 hours later returns and calls 911. She refused a breathalyzer. She was a bartender too.

Initially convicted by a jury trial and faced years in prison, ended up walking way with 1 year jail plea deal leaving the scene after attorney got an appeal on account she asked for a lawyer before speaking to police. Thats the kind of shit where it pays to have money for a lawyer, and a justice system that "everyone" knows your guilty but has to play by the book