OK, he blew a zero on the  intoxilyzer.  I would assume that the Police then  gave him a field test, (balance, one foot after the other, eye movement).  Based on the field test results is probably why they arrested him for DUII.  Stoned on MARIJUANA  comes into play for the DUII.  Just have to wait for more info from the authorities.  Jose  Feliciano (any relation to Jesus?) sang, " Baby LIGHT my Fire".  Was Jesus Lighten Up the Devils Salad??????????    Jose in action.       https://www.youtube.com/watch?v=5QJyyznbqUg

For all the Naysayers out there its possible he was on some "PRESCRIPTION Medicine"......................