MLB's Drug Policy
I was a police detective for a while. I know about cases being dismissed or lost based on a "technicality". What that means is that the accused person actually did what he was accused of, but the evidence of that misbehavior can't be used because 1) Someone made a mistake in handling or collecting the evidence of the behavior, or 2) A slick lawyer convinced a judge or other “fact-finder” that some public servant is corrupt.
Simple. He did it, but the evidence got tossed out.
That would be Ryan Braun's situation with Major League Baseball.