Second point regarding the evidence gathering by the Police. I don't think we know for sure that Police didn't gather enough evidence. While people were going crazy over, like you said, a lot of speculation imagining the worst, Police or media presented us very little to no evidence. Then I don't recall, but weeks later, bunch of stuff started to come out, like how Zimmerman was in fact badly beaten, substance found in Trayvon Martin's blood, and how Trayvon no longer was the kid that was depicted over & over by the media, but he went from the clean cut kid to a troubled young
man, who was into thug culture, and he would have never even been in the neighborhood that he was shot in, if it wasn't for 10-day school suspension. When these information started to leak out, it was indeed like all the raged hoodie-movement just died down, or the media stopped reporting it.
Sorry, back to the point. I think the Police obviously knew much more than they let on. Perhaps they could have done a better job interacting with the public when some of the assuming people were putting on their hoodies, ready to go on a crusade when they didn't even have
little facts regarding the incident. Don't get me wrong, I love hoodies & own a bunch of them.
I concur that it would be impossible to know exactly how it went down that night, as only other person who could have told us the other side of the story is dead. But I do believe that this problem with the police wasn't so much about evidence, but way they communicated with the public & media.