The L.A. County District Attorney has officially rejected the case against Rutler -- citing insufficient evidence to prosecute for driving under the influence of alcohol.
Law enforcement sources tell us ... Rulter's blood alcohol content was ultimately determined to be .06 at the time of his arrest ... which falls safely under California's legal limit to operate a vehicle, .08.
As TMZ first reported, Aguilera was a passenger in the car that morning ... and was arrested for public drunkenness when officers determined she was too hammered to take care of herself.
Hours after the arrest, officials decided they would not pursue any charges against the singer.
This completely changes things for me. I thought for sure I had him pegged as a bad influence. This is a perfect example you can't buy everything the media is selling. Sorry, Matt, we were just trying to have Christina's back. We are a bit on the defense as of late. I'm going to give you the benefit of the doubt on this one.