The Sanord PD initial police report had been at the City of Sanford website; the prosecutor asked them to take it down but it lives in the cloud. Ooops. This report is often cited as evidence of Zimmerman's initial injuries. It also mentions that yes, the police did take his gun.
As a resource, this old CNN artlcle reviewed some of the key witnesses in the Zimmerman case.
This old post noted that CNN mysteriously overlooked "John", who did not see how the fight started but claimed to have seen Zimmerman on the ground getting beaten and screaming for help; he spoke to Fox Orlando the day after the shooting. "John" is very probably the "Holy Shit, the guy's dead out here... Oh, my God" 911 caller available at Adam Wainwright's Mother Jones summary.
CNN also overlooked the 13 year old dogwalker who saw part of the scuffle (but not the start). He reportedly told police he saw Zimmerman (red sweater guy) on bottom, then backpedaled to not being sure what he saw. A theorist at Team JOM suggested that the 13 year old may have provided background screaming on the 911 tape in which we hear the gunshot. It's an ingenious sugestion the defense might make and which the prosecution might struggle to overcome.
Fox News interviewed George Zimmerman's father; we don't know what Zimmerman told the police, but this is what his dad told the public. [CNN with father, brother]. Do keep in mind - Zimmerman was a concealed carry permit holder who should have had prior exposure to some self-defense law; that knowledge may have guided his statements to the police (as well as his actions, perhaps).
This post used Google Maps, the 911 transcripts and other resources to attempt to recreate the crime scene. The NY Times eventually did something glossier, and others preceded me; The Wagist had some of the phone calls timed to the second, which is critical. The basic framework is surprisingly similar. A general theme - Zimmerman was behind Martin, who had several clear paths back to his home and the NBA game. That strongly suggests that Martin paused or turned back to interact with Zimmerman (a not so scary 185 pounder, per his booking sheet; up from 170 in the Times but down from 250.)
Voice experts were brought in by the Orlando Sentinel. Jeralyn Merritt noted legal problems (Florida uses a Frye standard for state trials); I noted technical problems by the simple expedient of citing the webites of audio experts, including those picked by the Sentinel. I also flagged financial self-interest on the part of one of the experts. CNN and the Daily Caller also wondered about how credible and admissible the attempt to match screams to speech might be.
One last idea I have not seen widely discussed - Zimmerman claims to have experienced head trauma the night of the shooting and now seems to be experiencing PTSD. Might the defense move to strike all his statements to the police on the grounds that he was fogbound? Time will tell. ['cboldt' notes that maybe the prosecution moves to strike. Very creative. Does that force Zimmerman to the stand?]
That's a start. I look forward to seeing suggestions for extending the list.
This review short-shrifts the media shenanigans on this case but that will surely be a part of the coverage here.
EMPOWERMENT: The oldy but goody Google trick for site-specific searches is demonstrated at the link.