One of my friends live in Oakland. Rioters there have been smashing businesses and looting them purportedly in protest of the Zimmerman verdict. One shopkeeper was beaten with a hammer after trying to protect his wares.
You know how swayed I am by the opinions of looters who beat innocent people because they're upset about a jury verdict three thousand miles away? NOT. AT. ALL.
He was charged with murder, not just manslaughter (requiring proof of a desire to kill, not just recklessness), and you think he's guilty. Ergo...
Technically speaking, he was walking aimlessly looking at different residences in the rain. That is somewhat unusual. It's consistent with a thief looking for an easy target. Unfortunately, it's also consistent with a houseguest who has gotten turned around in a cookie-cutter neighborhood and can't remember which house he's staying in.
If he had said "what the hell is your problem dude" before jumping Zimmerman and smashing his head into the ground, or called the cops about being followed (by what turned out to be neighborhood watch) instead of texting his friend about a "creepy-ass cracker," we'd be debating whether Zimmerman was racist without a coffin being involved.
You don't get to just attack people for "following" you. A lot of people I've spoken to who disagree with the verdict think you do, and that's simply not accurate. I'm a litigator and I hire private investigators to surreptitiously follow people who have made disability claims. So long as they're following you on public streets and not private property, that's essentially always legal. You can't use force against someone for doing something that's legal. I also have a friend who was pepper-sprayed by a woman who thought he was following her (completely mistaken), who didn't stop to demand what he was doing before resorting to force.