Just catching up and adding a couple of comments....
Regarding why LE has not released the video: Unless there's some activity or some person for which/whom LE needs help identifying, I can't really see the point. I figure that they can easily tell WHAT the kids are doing in that alley and I believe they've already said that everyone on camera is known to LE. I'm guessing that since there appears to be cameras most everywhere, LE is able to have kept tabs on the whereabouts of each POI throughout that evening as well as the next day, so I'm not really sure that the public can offer much more input. That said, I would love to see the video for my own curiosity.
I also am beginning to feel that while there appear to be many involved, only one (maybe two) know what actually happened to Lauren. I just can't see these boys all keeping their stories straight over the summer without living near each other and/or remaining in constant communication. I'm very doubtful that these kids are communicating. It wouldn't be difficult for LE to be tracking their phone calls, monitoring online activity through their IP address (which can be obtained via court order from their Internet provider), and general comings/goings. I just think it would be nearly impossible for them to continue communicating about this.
I'd imagine that if the perp is any one of these boys, his behavior would surely be quite suspicious by now. I know that with my own children, I can generally tell when their guilty of something (like even breaking a vase). I can't imagine that one of these boys could continue to act innocent, if he's not....unless he truly was taking so many drugs that evening that his memory is vague and therefore he's able to convince himself it didn't happen. I still think that one of these kids is involved somehow. The parents seem to believe that one or more know something.
I can't imagine what this will do to those who are innocent. Yes, they should not have been doing drugs. But that doesn't make them murderers. Whether we as parents like it or not, this is a huge part of the college scene. Not returning to college to complete their degree could place a devastating impact on their future. Many schools won't allow one to transfer back advanced level courses and if so, will only allow a min. number of credits. It may be impossible for them to continue elsewhere, without basically starting over. I feel for those who really had no involvement, yet I hope this serves as a wake up lesson to them about how this level of partying has consequences just be being indirectly involved.
I would also venture to say that IU may have a direct impact on what is being released and what isn't. No university wants bad PR. I live in a major college town. We have a really bad drug problem at our high school, which was shocking to me when we moved here b/c this is a nice family, affluent area. I was told by a few separate policemen (one being our school liason officer) that LE would love to have drug dogs in the schools but that the schools won't allow it. One officer and several community members have told me that apparently before I moved here, there was a huge political battle between the school district and the major university in town. This of course is hearsay but supposedly, when the university has professors in town on a campus job-scouting trip, they take their kids to the school and do not accept offers at the university if they think the school has a drug problem. Having the drug dogs would scream "We have a drug problem" so therefore the university was VERY against this and I'm suspecting that they threatened to pull the plug on some amazing programs which they offer to our school students. So apparently, the idea is to pretend we don't have a drug problem by sweeping it under the rug, talk about how AMAZING high school programs (which there are many), let the professors move here with their kids, then they can deal with their own kids' problems once they get suckered into the heavy drug use. Yes, I'm being sarcastic, and yes again this is hearsay, but I ABSOLUTELY believe this to be true! I've seen too many good kids go down the wrong paths and have begged for drug dogs in our schools. I suspect that IU holds a similar fear as our local university, that bad press will turn away students and perhaps faculty.