Just play it out like the msm. Facts are NOT a requisite..
It’s possible SHE could skate (as a mere mistake does not add up to a crime) but there will be either a civil judgment or a settlement.
If I were family I wouldn’t be proud that my brother or whoever was buzzed to the point of delirium on some drug, which appears to be the case, but might use the settlement to found a drug rehab program. Our modern bans do precious little to stop a determined abuser.