The treehouse cites an AP article saying the earbuds were found in Trayvon’s pocket. The NY Times writes they were found next to him, like Serino reported. I guess we’ll have to wait until the trail to find out.
Yeah, I think something happened at the “T”. Pure speculation on my part but I think what happened was after Martin took off running, he hid near one of the townhouses at the 'T' intersection. That explains why he told his girlfriend he thought he lost Zimmerman and why his voice was fearful and low as she put it. He soon realizes that the strange man who had been stalking him from his car was still pursuing him on foot. Zimmerman shines his flashlight on Trayvon's position, who asked something along the lines of, 'Why are you following me?' and Zimmerman responded, 'What are you doing around here?' Or Trayvon asked, “Ya got a problem, homey? (insert eyeroll here) Zimmerman, who obviously does have a problem, lies and says, “No”. And, of course, he fails to identify himself as a member of the neighborhood watch . . .
The girl's description, as well as other witnesses, say the argument started at the T and ended up about 50 feet away . . . which is backed up by evidence. So Zimmerman was less than truthful when he said he either:
a. he was punched at the “T” and immediately fell, or
b. he was punched at the “T” and either stumbled and/or pushed Trayvon about 10 feet away from the “T”.
At this point at the “T” they are face-to-face. Zimmerman, being the paranoid person he is, already convinced Martin was a criminal, panics and reaches for his gun. This is where in his story when he claims he reached for his cell phone . . . that he claims wasn't in his pants pocket like he though . . . even though he had just put it away a minute earlier. The little flashlight falls as Zimmerman reaches for his large flashlight, phone and/or gun. Trayvon notices the gun, they start to struggle for it, Trayvon punches George and runs, yelling for help. An enraged Zimmerman chases after him (he did not fall at the “T”), both guys leave a trail of belongings. Zimmerman catches up to him, tackles him, they wrestle for the gun on the ground. Zimmerman fires. There's no way Zimmerman could've unholstered with Martin straddling him or fired that shot from the position he claims.
Makes much more sense to me than Zimmerman's tall tales. 
Do you see the phone by Zimmerman’s right ear? We know that a neighbor called his wife after the shooting . . . who was he talking to? And who was he talking to before he called the police? Did Taaffe call him to let him know there was a suspicious guy walking thru the shortcut? Why didn’t he tell the police it was Taaffe’s house he was parked in front of? Was it Taaffee who he can be heard telling, “the keys are in the truck”? Taaffe lost his other son a few days ago . . . a DUI . . . killed his buddy too. That’s the son he threatened to cut the ba!!s off of. His daughter, Meredith, the one Taaffe hopes is killed while she’s deployed, supports the Martin family.
Going back for a minute to Zimmerman’s injuries . . . the fact that Zimmerman had some injuries does not mitigate him from being in the wrong to me one whit. I have yet to see a qualified medical expert offer an opinion on the photos of the wounds on the rear of Zimmerman’s head: both in the cell phone photo from the scene and the several photos taken at the jail. He seems to have suffered a longish but fairly shallow horizontal cut on the left rear of his head, a shorter but deeper cut/jab on the right side of his head. A couple of well-placed paper cuts will bleed as profusely. These wounds don’t strike me as anywhere near severe enough to be consistent with the ‘repeated head bashing’ claim. But I’d really like an M.D. (E.R. doc?) to look at those photos and offer a ‘diagnosis’ . . . ideally someone from somewhere else who has never heard of George Zimmerman and Trayvon Martin, and could just read the wounds for what they are outside of the larger narratives. Is there a doctor in the house?