I also find it very interesting that these 4 witnesses have changed their stories. I can't help but wonder if this is related to the previous allegations from several witnesses that investigating SPD officers either lead them into what they said, and/or that they "corrected" their testimony.
Also interesting to me, were the investigators' initial assurances to upset/frightened witnesses that "the shooter is a good guy," especially now that the questions as to GZ's relationship w/the SPD are being revisited. It's no longer just a matter of Officer Timothy Smith's familiarity w/ GZ, having responded to two of his previous 911 calls, but that GZ, too, worked closely with the SPD's community volunteer coordinator whom he praised in an email to the chief - one of three 2011 emails to the SPD showing, according to CNN, a "cordial relationship" with them, he went on several "ride alongs" with SPD officers, and has been shown (in a video) "roaming the SPD halls" 3 days after the shooting (complete w bandage on back of his head, but curiously, his eyes don't appear black, and what about that nose, seem pretty normal looking IMHO only...)
Here's a link to an article mentioning both the changes of heart by these witnesses and George's ride alongs w/theSPD.
[URL="http://abcnews.go.com/US/george-zimmerman-knew-sanford-police-officers-shooting/story?id=16414349#.T72Xs5gRZSV"/URL]
And more about the GZ/police relationship can be found here (no discussion thread for anything like this yet, so unsure where to put it):
[URL="http://www.cnn.com/2012/05/23/justice/florida-teen-shooting/index.html"[/URL]