The test results would have revealed any drugs in her system that have a long enough half-life to get into her hair. He may have thought a date-rape drug could be revealed. He may have thought nothing would be revealed and, even though he made the claim to the media about a date-rape drug being used, he may already have known there wasn't one used and he was hoping the test results would be negative to all drugs so he could shoot down the defense claim that Mangum was out of it when she arrived.
uhhhh.... who in their right mind would run a drug test on you-know-who hoping it would show negative to ALL drugs?
I'll bet the hair test shows too much flexeril, and the blood test shows too much alcohol.
That and the absence of date rape drugs when they would certainly have shown up, is a big slap to Nifong.
This all only matches one side's story.