In effect the prosecution is calling GZ a liar when he says TM attacked him without provocation, right? Getting access to TM's juvenile record, school disciplinary history, and social media could show that the behaviors GZ describes TM doing are well within his believable, known character.
Whereas, currently, most of the country has been fed an angelic picture of TM as "majoring in cheerfulness" being 12 or looking 12... a perfect young man who, according to Deedee "wouldn't fight" he would never fight she said, that was his problem :| he was a "baby" according to her, a mamma's boy. Ah it's too bad for Deedee she isn't as subtle in her efforts to white wash who Trayvon was, as some of the more sophisticated and older people who've been doing it are.
So there are a lot of people who want to take GZ's freedom and future away who are arguing that TM just wasn't the kind of person who would do what GZ describes him doing. If my future depended on me correcting the record on that point, you can bet your ass I'd want to dig into his school records, facebook, twitter, juvenile criminal record (if there is one), and anything else I could to demonstrate that he wasn't a baby who would never fight anyone, but rather that he was a little delinquent thug.
Now, compare that to the medical records... this once again is all about someone accusing GZ of lying I guess. The prosecutors want to imply he didn't really have a broken nose? Okay... we already know the doctor thought he did, but yes perhaps there was no x-ray done to absolutely prove it... alright, whatever. But, if the prosecution wants to see the doctor's report immediately after the injuries, if I were O'Mara I certainly would be like here, have at it. In fact he offered these at the first bail hearing. In fact, that doctor's report, among other things, should've prevented charges even being filed. So yea, that's relevant and appropriate for them to see. Personally I would've thought the police photographs of his injuries that night would've sufficed to demonstrate it was self-defense... especially when taken with witness testimony, etc, but whatever.
Now, to my mind showing that TM attacked someone 6 months ago, or 2 years ago, still demonstrates that he was the sort of person who would do what GZ describes.
But what relevance is there to what GZ's medical situation was 2 years ago? Or even 1 hour prior to TM's assault?
Where is the law that says you cannot defend yourself with deadly force if you're on a certain prescription or you recently had surgery?
"Don't eat solids for 48 hours, or exercise your 2nd amendment rights for 6 weeks"