It would likely be a matter of public record if LE finds this info. It would have to be provided to JM's attorney. Whether it's to JM's advantage if she were taking drugs, I don't know.
It's already out there that Hannah was under the influence of something. She was drunk. The definitive way this was said, "highly intoxicated" indicates that LE knows this pretty much for sure. She left a dinner, a party, and those there probably have told LE she was drinking a lot and was drunk when she left. UVA and LE should be meeting with all of those who were there at that get together. Whoever hosted it gave alcohol to someone underage. They let her leave alone at night KNOWING she had too much too drink. There is culpability here. But she is an adult. Over 18, and broke the laws all on her own knowingly. So there is some follow up to do here. My guess is that for right now, it's far more important to get all the info one could get from everyone and serves no good purpose to put the heat on these students and those who gave Hannah alcohol, did not call police when they saw her clearly out of it. When things settle down more, when Hannah is found, or the searches called off, these things should be addressed.
But how much good will it do? Probably none long term. Everyone on their toes now in Charlotteville but in time things will go back to the norm. I have been very interested in the Lauren Spierer case from 3 years ago, where a college co ed under the influence allegedly went off on her own and disappeared. She was clearly drunk or on drugs, probably both as she was followed on tape for a while as was Hannah,and even seen drinking at a bar. She had fake id, had already been charged before with underage drinking as were a number of her cohorts of that evening. Even as her dear, heart broken parents were there in Bloomington trying to to keep up the efforts to find her, get more info, Charlotte Spierer, the mom in the case noted seeeing other drunk, disoriented young women at the same times of the night, early evening, same locale as where Lauren disappeared, even with flyers and billboard festooned with her photos all about. I have young adult children and this has been a problem for a long time and it's not just from this generation.
But I will say, that in my day, at my college, young women were not often allowed to wander off at night drunk or on drugs in a state of confusion. Someone, a friend, a fellow student, someone there always would insist on escorting someone like that home. I don't know of a single case of this sort of thing happening with death, missing, police report. Nor do I now a single case of alcohol poisoning or death on the couch from oding at a party with no one noticing. And I now a multitude of such cases, some of people I know personally. Four of my friends have so lost their children, three while they were good students at prestigious colleges. And many more, including self, have had their kids getting in trouble with LE or school due to issues mixed with substance abuse including drinking. It's outright common.
So, absolutely, I do not think that "good", smart, successful college student or any young people, or anyone are excluded from getting into trouble of this sort. It's a tale as old as time. But what troubles me is that friends and fellow students don't seem to step up and help the person home. They knowingly let some drunk or confused person go out in the night. That is what I see as a big difference. In a number of these cases, and the Lauren Spierer one and this one are good examples, "friends" let a girl in bad shape go out alone in the dark. Didn't call campus security, did not call police. Did not get other students to help insist she stay put or escort her Just let go KNOWING she was blitzed.
So does it mater if Hannah took a certain drug or if she was just flat out drunk? it's clear she was confused. It's clear those who knew her let her leave alone in non-optimal shape. Someone offered to go with her, she declined, so that was it, instead of the person saying NO WAY should you go out in that shape alone. We need a few folks to take her home. IMO that party or dinner crowd should be getting flak, letting her go when people there, her friends and classmates KNEW she was drunk, and disoriented, serving drinks to underaged people--and she was a sophomore, they had to know she was likely underage, heck, probalby helped her get fake id if she had it as many of the kids do.
But right now the LE focus is as it should be, on getting Hannah back, locking up her perp, and finding out what happened. UVA should be addressing student conduct, but they will probably do as IU did. Focus on those things about the situation to make them look good instead of going after those who flagrently broke UVA rules on substance abuse if that is the case.