In all likelihood I think both Deedee and Zimmerman are doing some combination of:
1.) Trying to remember things as best they can
2.) Misremembering things despite this
3.) Deliberately lying or at least fudging certain moments and details to make their side look better
Both of them, doing all three. That's my hunch. That fits best with human nature and a high stress situation also.
Reasons to be skeptical of George Zimmerman:
1.) He ended up shooting someone, and this places him in a defensive, guilt-ridden position mentally. Regardless of any legal questions about it.
2.) His future is on the line.
3.) He's demonstrated an inability to remember things in exact detail.
4.) People frequently lie while in legal peril, the greater the peril, the higher the chance. His peril is very great.
5.) Was deceptive about his finances.
Reasons to be skeptical of Deedee:
1.) Didn't even appear on the radar until weeks into the media frenzy.
2.) Wouldn't speak to police about what she heard.
3.) Didn't contact anyone from any law enforcement or emergency service or Trayvon's family that night or for weeks after. This doesn't fit with what she's now saying she heard.
4.) Testimony changed in key, crucial ways between Crump / Matt Gutman phone interview, and deposition with Bernard De La Rionda (BDLR) from the prosecutors' office.
5.) During deposition, evidenced an extremely low mental ability. Evidenced also an incredibly poor command of the English language, far beyond just normal black teenager or any teenager speak. Way, way beyond that. Enough to question whether she might even have a severe learning disability at the least. Even some on the Trayvon side have suggested this possibility based on that interview.
6.) Offered to lie to BDLR as shown here (even more obvious that's what's going on via audio)
De la Rionda: Did he ever say something else about that, like, whether the guy had gotten out of the car? Did he ever describe, "Yeah, the guy, now, he's out of the car, and he's chasing me"? I know you said the guy, he said, the guy was following, but did he ever say the guy got out of the car?
Dee Dee: You want that too?
De la Rionda: I want to know the truth, whether, did he say that or not. If he didn't say that, that's fine.
and:
BDLR: Did Trayvon ever say the guy's coming at me, he's gonna hit me?
Long pause from Deedee, then in very low, sneaky tone:
"Yeaaaaaa you can say that."
BLDR: No I don't want you to guess. Did he ever say that?
Long ass pause from Deedee, while she tries to figure out what BLDR wants her to say and how far she can and can't go with lying.
PLEASE go listen to 15:45 here:
http://www.youtube.com/watch?v=PfVTM8sqz4k even if you've heard it before.
7.) Mentioning feelings of guilt about what happened to Trayvon but declining to elaborate on why. This could indicate, especially when taken together with her not contacting authorities and dodging police who wanted to interview her, that she may have egged Trayvon on, made him feel like a punk for running, and framed it as a, you either go back and beat that fool's ass, or you're a punk ass bitch type of thing. VERY plausible.
8.) Not issuing any statement about what she heard and who spoke in what order until GZ's account of this, in rough form, had come out. This could indicate wanting to wait and find out what GZ said, so as to not come up with something TOO wildly divergent from it.
So all in all I think there are a lot of reasons to doubt both of them and be skeptical of both of them.
This is why I prefer to just look at the physical and eyewitness evidence.
1.) GZ had injuries, consistent with what he describes. TM did not have injuries apart from one on his finger from inflicting GZ's wounds, and the bullet hole. This indicates a one sided beatdown situation, not a struggle. Just as GZ describes.
2.) The ballistics are consistent with TM being on top of GZ and very near him at the time of the shot, this fits GZ's account.
3.) There is an eyewitness who places TM on top of GZ just prior to the shot, either beating him or holding him down and preventing his escape. This witness believed it to be beating prior to the media frenzy with the 12 year old pics of Trayvon all over the news, and initially said it was GZ screaming. You take his account and COMBINE IT with the physical evidence and you know which thing he saw. It had to be a beating he saw because GZ had those wounds. He has to be right about GZ screaming, because GZ had those wounds and it's GZ's voice in the screams.